US20110135737A1 - Compositions for respiratory delivery of active agents and associated methods and systems - Google Patents

Compositions for respiratory delivery of active agents and associated methods and systems Download PDF

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Publication number
US20110135737A1
US20110135737A1 US12/790,671 US79067110A US2011135737A1 US 20110135737 A1 US20110135737 A1 US 20110135737A1 US 79067110 A US79067110 A US 79067110A US 2011135737 A1 US2011135737 A1 US 2011135737A1
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United States
Prior art keywords
active agent
suspension
particles
suspending
suspending particles
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Abandoned
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US12/790,671
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English (en)
Inventor
Reinhard Vehring
Michael Steven Hartman
Adrian Edward Smith
Vidya B. Joshi
Sarvajna Kumar Dwivedi
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Pearl Therapeutics Inc
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Pearl Therapeutics Inc
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=42269864&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US20110135737(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Pearl Therapeutics Inc filed Critical Pearl Therapeutics Inc
Priority to US12/790,671 priority Critical patent/US20110135737A1/en
Assigned to PEARL THERAPEUTICS, INC. reassignment PEARL THERAPEUTICS, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HARTMAN, MICHAEL STEVEN, DWIVEDI, SARVAJNA KUMAR, JOSHI, VIDYA B., SMITH, ADRIAN EDWARD, VEHRING, REINHARD
Publication of US20110135737A1 publication Critical patent/US20110135737A1/en
Priority to US15/135,389 priority patent/US20170071850A1/en
Priority to US15/932,249 priority patent/US20190038548A1/en
Priority to US16/983,543 priority patent/US20210186861A1/en
Abandoned legal-status Critical Current

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    • A61K9/0073—Sprays or powders for inhalation; Aerolised or nebulised preparations generated by other means than thermal energy
    • A61K9/008—Sprays or powders for inhalation; Aerolised or nebulised preparations generated by other means than thermal energy comprising drug dissolved or suspended in liquid propellant for inhalation via a pressurized metered dose inhaler [MDI]
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Definitions

  • the present disclosure relates generally to pharmaceutical formulations and methods for delivery of one or more active agents via the respiratory tract.
  • the present disclosure relates to compositions, methods, and systems for pulmonary delivery of active agents via a metered dose inhaler.
  • inhalers are well known devices for administering an active agent to a subject's respiratory tract, and several different inhaler systems are currently commercially available. Three common inhaler systems include dry powder inhalers, nebulizers and metered dose inhalers (MDIs).
  • MDIs metered dose inhalers
  • MDIs may be used to deliver medicaments in a solubilized form or as a suspension.
  • MDIs use a relatively high vapor pressure propellant to expel aerosolized droplets containing an active agent into the respiratory tract when the MDI is activated.
  • Dry powder inhalers generally rely on the patient's inspiratory efforts to introduce a medicament in a dry powder form to the respiratory tract.
  • nebulizers form a medicament aerosol to be inhaled by imparting energy to a liquid solution or suspension.
  • MDIs are active delivery devices that utilize the pressure generated by a propellant.
  • CFCs chlorofluorocarbons
  • traditional CFC propellants are understood to have a negative environmental impact, which has led to the development of alternative propellants that are believed to be more environmentally-friendly, such as perfluorinated compounds (PFCs) and hydrofluoroalkanes (HFAs).
  • PFCs perfluorinated compounds
  • HFAs hydrofluoroalkanes
  • the active agent to be delivered by an MDI is typically provided as a fine particulate dispersed within a propellant or combination of two or more propellants (i.e., a propellant “system”).
  • a propellant “system” In order to form the fine particulates, the active agent is typically micronized. Fine particles of active agent suspended in a propellant or propellant system tend to aggregate or flocculate rapidly. This is particularly true of active agents present in micronized form. In turn, aggregation or flocculation of these fine particles may complicate the delivery of the active agent. For example, aggregation or flocculation can lead to mechanical failures, such as those that might be caused by obstruction of the valve orifice of the aerosol container.
  • Unwanted aggregation or flocculation of drug particles may also lead to rapid sedimentation or creaming of drug particles, and such behavior may result in inconsistent dose delivery, which can be particularly troublesome with highly potent, low dose medicaments.
  • Another problem associated with such suspension MDI formulations relates to crystal growth of the drug during storage, resulting in a decrease over time of aerosol properties and delivered dose uniformity of such MDIs. More recently, solution approaches, such as those disclosed in U.S. Pat. No. 6,964,759, have been proposed for MDI formulations containing anticholinergics.
  • surfactants are often used to coat the surfaces of the active agent in order to minimize or prevent the problem of aggregation and maintain a substantially uniform dispersion.
  • the use of surfactants in this manner is sometimes referred to as “stabilizing” the suspension.
  • many surfactants that are soluble and thus effective in CFC systems are not effective in HFA and PFC propellant systems because such surfactants exhibit different solubility characteristics in non-CFC propellants.
  • FIG. 1 is a graph, which depicts the particle size distribution exhibited by an exemplary co-suspension composition according to the present description, which included glycopyrrolate, a long-acting muscarinic antagonist, as the active agent.
  • Co-suspension MDIs were subjected to temperature cycling conditions (alternating 6 h hold time at ⁇ 5 or 40° C.) for 12 weeks.
  • FIG. 2 is a graph, which depicts the particle size distribution exhibited by an exemplary co-suspension composition according to the present description, which included glycopyrrolate, a long-acting muscarinic antagonist, as the active agent.
  • Co-suspension MDIs were subjected to temperature cycling conditions (alternating 6 h hold time at ⁇ 5 or 40° C.) for 24 weeks.
  • FIG. 3 provides a micrograph illustrating the morphologies of a variety of suspending particles prepared according to Example 5.
  • FIG. 4 is a photograph of two vials that allows visualization of a co-suspension formed using active agent particles formed using glycopyrrolate and suspending particles formed using a saccharide.
  • FIG. 5 is a graph, which depicts the particle size distribution of an exemplary glycopyrrolate co-suspension prepared according to the present description, containing 4.5 ⁇ g per actuation delivered dose of glycopyrrolate and 6 mg/mL suspending particles and subjected to temperature cycling conditions (alternating 6 h hold time at ⁇ 5 or 40° C.).
  • FIG. 6 is a graph, which depicts the particle size distribution of an exemplary glycopyrrolate co-suspension prepared according to the present description, containing 36 ⁇ g per actuation delivered dose of glycopyrrolate and 6 mg/mL suspending particles and subjected to temperature cycling conditions (alternating 6 h hold time at ⁇ 5 or 40° C.).
  • FIG. 7 is a graph, which depicts the delivered dose through canister life of an exemplary glycopyrrolate co-suspension prepared according to the present description, containing 4.5 ⁇ g per actuation delivered dose of glycopyrrolate and 6 mg/mL suspending particles
  • FIG. 8 is a graph, which depicts the delivered dose through canister life of an exemplary glycopyrrolate co-suspension prepared according to the present description, containing 36 ⁇ g per actuation delivered dose of glycopyrrolate and 6 mg/mL suspending particles
  • FIG. 9 is a graph, which depicts the particle size distribution of an exemplary glycopyrrolate co-suspension prepared according to the present description, containing 36 ⁇ g per actuation delivered dose of glycopyrrolate and 6 mg/mL suspending particles and subjected to 12 months storage at 25° C./60% RH unprotected.
  • FIG. 10 is a graph, which depicts the delivered dose through canister life of an exemplary glycopyrrolate co-suspension prepared according to the present description, containing 32 ⁇ g per actuation delivered dose of glycopyrrolate and 6 mg/mL suspending particles and subjected to temperature cycling conditions (alternating 6 h hold time at ⁇ 5 or 40° C.).
  • FIG. 11 is a graph, which depicts the particle size distribution of an exemplary glycopyrrolate co-suspension prepared according to the present description, containing 32 ⁇ g per actuation delivered dose of glycopyrrolate and 6 mg/mL suspending particles and subjected to temperature cycling conditions (alternating 6 h hold time at ⁇ 5 or 40° C.)
  • FIG. 12 is a graph, which depicts the particle size distribution of an exemplary glycopyrrolate co-suspension prepared according to the present description, containing 24 ⁇ g per actuation delivered dose of glycopyrrolate and 6 mg/mL suspending particles and subjected to 6 weeks storage at 50° C./ambient relative humidity and 12 weeks at 40° C.
  • FIG. 13 is a photograph that allows visualization of co-suspension compositions prepared according to the present description which include formoterol fumarate active agent particles.
  • FIG. 14 is a graph, which depicts the delivered dose uniformity achieved by formoterol co-suspension compositions prepared according to the present description.
  • FIG. 15 is a graph, which depicts the aerodynamic particle size distribution determined by cascade impaction of exemplary formoterol co-suspension compositions prepared according to the present description and stored for three months at 25° C./75% RH, with protective overwrap, or at 40° C./75% RH with protective overwrap.
  • FIG. 16 is a graph, which depicts the chemical stability of exemplary co-suspension compositions including crystalline formoterol as the active agent.
  • the results depicted in this figure allow comparison of the chemical stability of formoterol achieved in a co-suspension composition formulated using crystalline formoterol material with the chemical stability of suspension formulations prepared using spray dried formoterol fumarate.
  • FIG. 17 through FIG. 20 are electron micrographs of suspending particles prepared from various different materials, with FIG. 17 providing a micrograph of trehalose suspending particles, FIG. 18 providing a micrograph of HP-8-cyclodextrin suspending particles, FIG. 19 providing a micrograph of Ficoll MP 70 suspending particles, and FIG. 20 providing a micrograph of inulin suspending particles.
  • FIG. 21 provides a graph that depicts the aerodynamic particle size distribution determined by cascade impaction of exemplary co-suspension compositions prepared according to the present description and including glycopyrrolate active agent particles.
  • FIG. 22 provides a graph that depicts the aerodynamic particle size distribution determined by cascade impaction of exemplary co-suspension compositions prepared according to the present description and including formoterol active agent particles.
  • FIG. 23 provides a graph that depicts the delivered dose uniformity achieved by ultra low-dose formoterol co-suspension compositions prepared according to the present description.
  • FIG. 24 is a graph, which depicts the delivered dose uniformity of a co-suspension formulation containing glycopyrrolate and formoterol fumarate prepared according to the present description.
  • FIG. 25 is a graph, which depicts the delivered dose ratio of the co-suspension formulation described in relation to FIG. 24 .
  • FIG. 26 is a graph, which depicts the delivered dose uniformity of a second co-suspension formulation containing formoterol fumarate and glycopyrrolate prepared according to the present description.
  • FIG. 27 is a graph, which depicts the delivered dose ratio of the second co-suspension formulation described in relation to FIG. 26 .
  • FIG. 28 is a graph, which depicts the delivered dose uniformity of glycopyrrolate and formoterol fumarate in a co-suspension formulation prepared according to the present description upon storage under different conditions, as indicated.
  • FIG. 29 is a graph, which depicts the particle size distribution of glycopyrrolate (top) and formoterol (bottom) in exemplary co-suspension formulations prepared according to the present description upon storage under different conditions, as indicated.
  • FIG. 30 provides graphs illustrating the particle size distribution of glycopyrrolate (top) and formoterol (bottom) achieved by an exemplary co-suspension upon storage at indicated conditions.
  • FIG. 31 provides graphs illustrating the particle size distribution of glycopyrrolate (top) and formoterol (bottom) achieved by an exemplary dual co-suspension compared to particle size distributions achieved by formulations including either glycopyrrolate or formoterol fumarate alone.
  • FIG. 32 is a graph that depicts the formoterol fumarate particle size distribution achieved by a co-suspension prepared according to the present description, which included microcrystalline formoterol fumarate and glycopyrrolate active agent particles compared to a co-suspension only containing crystalline formoterol fumarate.
  • FIG. 33 is a graph that depicts the glycopyrrolate particle size distribution achieved by a dual co-suspension prepared according to the present description, which included microcrystalline glycopyrrolate active agent particles and microcrystalline formoterol fumarate active agent particles with two different particle size distributions (denoted “fine” and “coarse”) or spray dried formoterol fumarate.
  • FIG. 34 is a graph that depicts the formoterol fumarate particle size distribution achieved by a second dual co-suspension prepared according to the present description, which included microcrystalline formoterol fumarate and microcrystalline glycopyrrolate active agent particles compared to one that contained microcrystalline glycopyrrolate active agent particles and spray dried formoterol fumarate particles.
  • FIG. 35 is a graph, which depicts the delivered dose uniformity of glycopyrrolate and formoterol fumarate in an exemplary dual co-suspension formulation prepared according to the present description.
  • FIG. 36 depicts the delivered dose uniformity for each active agent included in an exemplary triple co-suspension composition, which included microcyrstalline glycopyrrolate, formoterol fumarate and mometasone furoate active agent particles.
  • FIG. 37 is a graph depicting the formoterol fumarate aerodynamic particle size distributions achieved in a triple co-suspension prepared according to the present description, which included microcrystalline glycopyrrolate, formoterol fumarate and mometasone furoate active agent particles, compared to that achieved in a dual co-suspension which included glycopyrrolate and formoterol fumarate.
  • FIG. 38 is a graph depicting the glycopyrrolate aerodynamic particle size distributions achieved in a triple co-suspension prepared according to the present description, which included microcrystalline glycopyrrolate, formoterol fumarate and mometasone furoate active agent particles, compared to that achieved in a dual co-suspension which included glycopyrrolate and formoterol fumarate.
  • FIG. 39 is a graph depicting the glycopyrrolate and tiotropium bromide aerodynamic particle size distributions achieved by a triple co-suspension prepared according to the present description, which in addition to either glycopyrrolate or tiotropium bromide included formoterol fumarate and mometasone furoate microcrystalline active agent particles.
  • compositions, methods, and systems for respiratory delivery of one or more active agents are formulated for pulmonary delivery of one or more active agents via an MDI.
  • the compositions described herein may be formulated for nasal delivery via an MDI.
  • the methods described herein include methods of stabilizing formulations including one or more active agents for respiratory delivery, as well as methods for pulmonary delivery of active agents.
  • the methods described herein include methods of stabilizing formulations including one or more active agents having specific characteristics, such as potent and highly potent active agents and active agents with particular solubility characteristics.
  • the methods described herein include methods of achieving delivery of such active agents to a patient.
  • systems for pulmonary delivery of one or more active agents with specific embodiments of such systems including an MDI system utilizing a composition as described herein.
  • the methods described herein include methods for treating a pulmonary disease or disorder amenable to treatment by respiratory delivery of a co-suspension composition as described herein.
  • the compositions, methods and systems described herein can be used to treat inflammatory or obstructive pulmonary diseases or conditions.
  • compositions, methods and systems described herein can be used to treat patients suffering from a disease or disorder selected from asthma, chronic obstructive pulmonary disease (COPD), exacerbation of airways hyper reactivity consequent to other drug therapy, allergic rhinitis, sinusitis, pulmonary vasoconstriction, inflammation, allergies, impeded respiration, respiratory distress syndrome, pulmonary hypertension, pulmonary vasoconstriction, and any other respiratory disease, condition, trait, genotype or phenotype that can respond to the administration of, for example, a LAMA, LABA, corticosteroid, or other active agent as described herein, whether alone or in combination with other therapies.
  • COPD chronic obstructive pulmonary disease
  • compositions, systems and methods described herein can be used to treat pulmonary inflammation and obstruction associated with cystic fibrosis.
  • COPD chronic obstructive lung disease
  • COAD chronic obstructive airway disease
  • CAL chronic airflow limitation
  • CORD chronic obstructive respiratory disease
  • asthma refers to asthma of whatever type or genesis, including intrinsic (non-allergic) asthma and extrinsic (allergic) asthma, mild asthma, moderate asthma, severe asthma, bronchitic asthma, exercise-induced asthma, occupational asthma and asthma induced following bacterial infection. Asthma is also to be understood as embracing whez-infant syndrome.
  • active agent is used herein to include any agent, drug, compound, composition or other substance that may be used on, or administered to a human or animal for any purpose, including therapeutic, pharmaceutical, pharmacological, diagnostic, cosmetic and prophylactic agents and immunomodulators.
  • active agent may be used interchangeably with the terms, “drug,” “pharmaceutical,” “medicament,” “drug substance,” or “therapeutic.”
  • drug may also encompass natural or homeopathic products that are not generally considered therapeutic.
  • association refers to an interaction or relationship between a chemical entity, composition, or structure in a condition of proximity to a surface, such as the surface of another chemical entity, composition, or structure.
  • the association includes, for example, adsorption, adhesion, covalent bonding, hydrogen bonding, ionic bonding and electrostatic attraction, Lifshitz-van der Waals interactions and polar interactions.
  • adhesion or “adhesion” is a form of association and is used as a generic term for all forces tending to cause a particle or mass to be attracted to a surface.
  • Adhere also refers to bringing and keeping particles in contact with each other, such that there is substantially no visible separation between particles due to their different buoyancies in a propellant under normal conditions.
  • a particle that attaches to or binds to a surface is encompassed by the term “adhere.”
  • Normal conditions may include storage at room temperature or under an accelerative force due to gravity.
  • active agent particles may associate with suspending particles to form a co-suspension, where there is substantially no visible separation between the suspending particles and the active agent particles or flocculates thereof due to differences in buoyancy within a propellant.
  • Suspending particles refer to a material or combination of materials that is acceptable for respiratory delivery, and acts as a vehicle for active agent particles. Suspending particles interact with the active agent particles to facilitate repeatable dosing, delivery or transport of active agent to the target site of delivery, i.e., the respiratory tract.
  • the suspending particles described herein are dispersed within a suspension medium including a propellant or propellant system, and can be configured according to any shape, size or surface characteristic suited to achieving a desired suspension stability or active agent delivery performance.
  • Exemplary suspending particles include particles that exhibit a particle size that facilitates respiratory delivery of active agent and have physical configurations suited to formulation and delivery of the stabilized suspensions as described herein.
  • co-suspension refers to a suspension of two or more types of particles having different compositions within a suspension medium, wherein one type of particle associates at least partially with one or more of the other particle types.
  • the association leads to an observable change in one or more characteristics of at least one of the individual particle types suspended in the suspension medium. Characteristics modified by the association may include, for example, one or more of the rate of aggregation or flocculation, the rate and nature of separation, i.e. sedimentation or creaming, density of a cream or sediment layer, adhesion to container walls, adhesion to valve components, and rate and the level of dispersion upon agitation.
  • Exemplary methods for assessing whether a co-suspension is present can include the following: If one particle type has a pycnometric density greater than the propellant and another particle type has a pycnometric density lower than the propellant, a visual observation of the creaming or sedimentation behavior can be employed to determine the presence of a co-suspension.
  • the term “pycnometric density” refers to the density of a material that makes up a particle, excluding voids within the particle.
  • the materials can be formulated or transferred into a transparent vial, typically a glass vial, for visual observation. After initial agitation the vial is left undisturbed for a sufficient time for formation of a sediment or cream layer, typically 24 hours.
  • co-suspension includes partial co-suspensions, where a majority of the at least two particle types associate with each other, however, some separation (i.e., less than a majority) of the at least two particle types may be observed.
  • the exemplary co-suspension test may be performed at different propellant temperatures to accentuate the sedimentation or creaming behavior of particle types with a density close to the propellant density at room temperature. If the different particle types have the same nature of separation, i.e. all sediment or all cream, the presence of a co-suspension can be determined by measuring other characteristics of the suspension, such as rate of aggregation or flocculation, rate of separation, density of cream or sediment layer, adhesion to container walls, adhesion to valve components, and rate and level of dispersion upon agitation, and comparing them to the respective characteristics of the similarly suspended individual particle types. Various analytical methods generally known to those skilled in the art can be employed to measure these characteristics.
  • fine particle dose refers to the dose, either in total mass or fraction of the nominal dose or metered dose, that is within a respirable range.
  • the dose that is within the respirable range is measured in vitro to be the dose that deposits beyond the throat stage of a cascade impactor, i.e., the sum of dose delivered at stages 3 through filter in a Next Generation Impactor operated at a flow rate of 301/min.
  • fine particle fraction refers to the proportion of the delivered material relative to the delivered dose (i.e., the amount that exits the actuator of a delivery device, such as an MDI) that is within a respirable range.
  • the amount of delivered material within the respirable range is measured in vitro as the amount of material that deposits beyond the throat stage of a cascade impactor, e.g., the sum of the material delivered at stages 3 through filter in a Next Generation Impactor operated at a flow rate of 30 l/min.
  • the term “inhibit” refers to a measurable lessening of the tendency of a phenomenon, symptom or condition to occur or the degree to which that phenomenon, symptom or condition occurs.
  • the term “inhibit” or any form thereof, is used in its broadest sense and includes minimize, prevent, reduce, repress, suppress, curb, constrain, restrict, slow progress of and the like.
  • Mass median aerodynamic diameter refers to the aerodynamic diameter of an aerosol below which 50% of the mass of the aerosol consists of particles with an aerodynamic diameter smaller than the MMAD, with the MMAD being calculated according to monograph 601 of the United States Pharmacopeia (“USP”).
  • USP United States Pharmacopeia
  • optical diameter indicates the size of a particle as measured by the Fraunhofer diffraction mode using a laser diffraction particle size analyzer equipped with a dry powder dispenser (e.g., Sympatec GmbH, Clausthal-Zellerfeld, Germany).
  • solution mediated transformation refers to the phenomenon in which a more soluble form of a solid material (i.e. particles with small radius of curvature (a driving force for Ostwald ripening), or amorphous material) dissolves and recrystallizes into the more stable crystal form that can coexist in equilibrium with its saturated propellant solution.
  • a more soluble form of a solid material i.e. particles with small radius of curvature (a driving force for Ostwald ripening), or amorphous material
  • a “patient” refers to an animal in which one or more active agents as described herein will have a therapeutic effect.
  • the patient is a human being.
  • Perforated microstructures refer to suspending particles that include a structural matrix that exhibits, defines or comprises voids, pores, defects, hollows, spaces, interstitial spaces, apertures, perforations or holes that allow the surrounding suspension medium to permeate, fill or pervade the microstructure, such as those materials and preparations described in U.S. Pat. No. 6,309,623 to Weers, et al., which is incorporated herein by reference in its entirety.
  • the primary form of the perforated microstructure is, generally, not essential, and any overall configuration that provides the desired formulation characteristics is contemplated herein. Accordingly, in one embodiment, the perforated microstructures may comprise approximately spherical shapes, such as hollow, porous, spray-dried microspheres. However, collapsed, corrugated, deformed or fractured particulates of any primary form or aspect ratio may also be compatible.
  • perforated microstructures may be formed of any biocompatible material that does not substantially degrade or dissolve in the selected suspension medium. While a wide variety of materials may be used to form the particles, in some embodiments, the structural matrix is associated with, or includes, a surfactant such as, a phospholipid or fluorinated surfactant. Although not required, the incorporation of a compatible surfactant in the perforated microstructure or, more generally, the suspending particles, can improve the stability of the respiratory dispersions, increase pulmonary deposition and facilitate the preparation of the suspension.
  • suspension medium refers to a substance providing a continuous phase within which active agent particles and suspending particles can be dispersed to provide a co-suspension formulation.
  • the suspension medium used in co-suspension formulations described herein includes propellant.
  • propellant refers to one or more pharmacologically inert substances which exert a sufficiently high vapor pressure at normal room temperature to propel a medicament from the canister of an MDI to a patient on actuation of the MDI's metering valve. Therefore, the term “propellant” refers to both a single propellant and to a combination of two or more different propellants forming a “propellant system.”
  • respirable generally refers to particles, aggregates, drops, etc. sized such that they can be inhaled and reach the airways of the lung.
  • the terms “physical stability” and “physically stable” refer to a composition that is resistant to one or more of aggregation, flocculation, and particle size changes due to solution mediated transformations and is capable of substantially maintaining the MMAD of suspending particles and the fine particle dose.
  • physical stability may be evaluated through subjecting compositions to accelerated degradation conditions, such as by temperature cycling as described herein.
  • potent indicates active agents that are therapeutically effective at or below doses ranging from about 0.01 mg/kg to about 1 mg/kg. Typical doses of potent active agents generally range from about 100 ⁇ g to about 100 mg.
  • the term “highly potent” indicates active agents that are therapeutically effective at or below doses of about 10 ⁇ g/kg. Typical doses of highly potent active agents generally range up to about 100 ⁇ g.
  • suspension stability and “stable suspension” refer to suspension formulations capable of maintaining the properties of a co-suspension of active agent particles and suspending particles over a period of time.
  • suspension stability may be measured through delivered dose uniformity achieved by co-suspension compositions described herein.
  • substantially insoluble means that a composition is either totally insoluble in a particular solvent or it is poorly soluble in that particular solvent.
  • the term “substantially insoluble” means that a particular solute has a solubility of less than one part per 100 parts solvent.
  • the term “substantially insoluble” includes the definitions of “slightly soluble” (from 100 to 1000 parts solvent per 1 part solute), “very slightly soluble” (from 1000 to 10,000 parts solvent per 1 part solute) and “practically insoluble” (more than 10,000 parts solvent per 1 part solute) as given in Table 16-1 of Remington: The Science and Practice of Pharmacy, 21st ed. Lippincott, Williams & Wilkins, 2006, p. 212.
  • surfactant refers to any agent which preferentially adsorbs to an interface between two immiscible phases, such as the interface between water and an organic polymer solution, a water/air interface or organic solvent/air interface.
  • Surfactants generally possess a hydrophilic moiety and a lipophilic moiety, such that, upon adsorbing to microparticles, they tend to present moieties to the continuous phase that do not attract similarly-coated particles, thus reducing particle agglomeration.
  • surfactants may also promote adsorption of a drug and increase bioavailability of the drug.
  • a “therapeutically effective amount” is the amount of compound which achieves a therapeutic effect by inhibiting a disease or disorder in a patient or by prophylactically inhibiting or preventing the onset of a disease or disorder.
  • a therapeutically effective amount may be an amount which relieves to some extent one or more symptoms of a disease or disorder in a patient; returns to normal either partially or completely one or more physiological or biochemical parameters associated with or causative of the disease or disorder; and/or reduces the likelihood of the onset of the disease of disorder.
  • chemically stable and “chemical stability” refer to co-suspension formulations wherein the individual degradation products of active agent remain below the limits specified by regulatory requirements during the shelf life of the product for human use (e.g., 1% of total chromatographic peak area per ICH guidance Q3B(R2)) and there is acceptable mass balance (e.g., as defined in ICH guidance Q1E) between active agent assay and total degradation products.
  • compositions described herein are co-suspensions that include a suspension medium including a propellant, active agent particles, and suspending particles.
  • the compositions described herein may include one or more additional constituents.
  • variations and combinations of components of the compositions described herein may be used.
  • the active agent particles included in the co-suspension formulations may include two or more active agents, or two or more different species of active agent particles may be used, with each different species of active agent particle including one or more different active agents.
  • two or more species of suspending particles may be used in compositions for the delivery of one or more active agents or active agent particles.
  • the compositions may include an active agent disposed within the material forming a suspending particle and another active agent(s) co-suspended as active agent particles with the suspending particles.
  • active agent particles exhibit an association with the suspending particles such that separation of the active agent particles from the suspending particles is substantially prevented, resulting in co-location of active agent particles and suspending particles within the suspension medium.
  • the medium within which they are suspended e.g., a propellant or propellant system
  • buoyancy forces cause creaming of particles with lower density than the propellant and sedimentation of particles with higher density than the propellant. Therefore, in suspensions that consist of a mixture of different types of particles with different density or different tendencies to flocculate, sedimentation or creaming behavior is expected to be specific to each of the different particle types and expected to lead to separation of the different particle types within the suspension medium.
  • the combinations of propellant, active agent particles and suspending particles described herein provide co-suspensions wherein active agent particles and suspending particles co-locate within the propellant (i.e., the active agent particles associate with the suspending particles such that suspending particles and active agent particles do not exhibit substantial separation relative to each other, such as by differential sedimentation or creaming, even after a time sufficient for the formation of a cream or sediment layer).
  • the compositions described herein form co-suspensions wherein the suspending particles remain associated with active agent particles when subjected to buoyancy forces amplified by temperature fluctuations and/or centrifugation at accelerations up to an over, for example, 1 g, 10 g, 35 g, 50 g, and 100 g.
  • co-suspensions described herein are not defined by a specific threshold force of association.
  • a co-suspension as contemplated herein may be successfully achieved where the active agent particles associate with the suspending particles such that there is no substantial separation of active agent particles and suspending particles within the continuous phase formed by the suspension medium under typical patient use conditions.
  • Co-suspensions of active agent particles and suspending particles provide desirable chemical stability, suspension stability, and active agent delivery characteristics.
  • co-suspensions as described herein can inhibit or reduce one or more of the following: flocculation of active agent material; differential sedimentation or creaming of active agent particles an suspending particles; solution mediated transformation of active agent material; and loss of active agent to the surfaces of the container closure system, in particular the metering valve components.
  • co-suspensions according to the present description can provide a stable formulation that provides consistent dosing characteristics, even for potent and highly potent active agents, while utilizing a relatively simple HFA suspension medium that does not require modification by the addition of, for example, cosolvents, antisolvents, solubilizing agents or adjuvants.
  • Providing a co-suspension according to the present description may also simplify formulation, delivery and dosing of the desired active agents.
  • the delivery, physical stability, and dosing of an active agent contained within such a dispersion may be substantially controlled through control of the size, composition, morphology and relative amount of the suspending particles, and is less dependent upon the size and morphology of the particles of active agent.
  • the pharmaceutical compositions described herein can be formulated with a non-CFC propellant or propellant system substantially free of antisolvents, solubilizing agents, cosolvents, or adjuvants.
  • Co-suspension compositions formulated according to the present teachings can inhibit physical and chemical degradation of the active agents included therein.
  • the compositions described herein may inhibit one or more of chemical degradation, flocculation, aggregation and solution mediated transformation of the active agents included in the compositions.
  • the chemical and suspension stability provided by the co-suspension compositions described herein allows the compositions to be dispensed in a manner that achieves desirable delivered dose uniformity throughout emptying of an MDI canister (“DDU”), even where the active agents to be delivered are highly potent and delivered at very low doses.
  • DDU MDI canister
  • Co-suspension compositions as described herein can achieve a DDU of ⁇ 30%, or better for each of the active agents included therein. In one such embodiment, compositions described herein achieve a DDU of ⁇ 25%, or better, for each of the active agents included therein. In another such embodiment, compositions described herein achieve a DDU of ⁇ 20%, or better, for each of the active agents included therein.
  • co-suspension compositions according to the present description serve to substantially preserve FPF and FPD performance throughout emptying of an MDI canister, even after being subjected to accelerated degradation conditions. For instance, compositions according to the present description maintain as much as 80%, 90%, 95%, or more, of the original FPF or FPD performance, even after being subjected to accelerated degradation conditions.
  • Co-suspension compositions described herein provide the added benefit of achieving such performance while being formulated using non-CFC propellants.
  • the compositions described herein achieve one or more of a targeted DDU, FPF or FPD, while being formulated with suspension medium including only one or more non-CFC propellants and without the need to modify the characteristics of the non-CFC propellant, such as by the addition of, for example, one or more cosolvent, antisolvent, solubilizing agent, adjuvant or other propellant modifying material.
  • the suspension medium included in a composition described herein includes one or more propellants.
  • suitable propellants for use as suspension mediums are those propellant gases that can be liquefied under pressure at room temperature, and upon inhalation or topical use, are safe and toxicologically innocuous. Additionally, it is desirable that the selected propellant be relatively non-reactive with the suspending particles or active agent particles.
  • Exemplary compatible propellants include hydrofluoroalkanes (HFAs), perfluorinated compounds (PFCs), and chlorofluorocarbons (CFCs).
  • propellants that may be used to form the suspension medium of the co-suspensions disclosed herein include 1,1,1,2-tetrafluoroethane (CF 3 CH 2 F) (HFA-134a), 1,1,1,2,3,3,3-heptafluoro-n-propane (CF 3 CHFCF 3 ) (HFA-227), perfluoroethane, monochloro-fluoromethane, 1,1difluoroethane, and combinations thereof.
  • CF 3 CH 2 F 1,1,1,2-tetrafluoroethane
  • CF 3 CHFCF 3 1,1,1,2,3,3,3-heptafluoro-n-propane
  • perfluoroethane perfluoroethane
  • monochloro-fluoromethane 1,1difluoroethane, and combinations thereof.
  • suitable propellants include, for example: short chain hydrocarbons; C 1-4 hydrogen-containing chlorofluorocarbons such as CH 2 ClF, CCl 2 FCHClF, CF 3 CHClF, CHF 2 CClF 2 , CHClFCHF 2 , CF 3 CH 2 Cl, and CClF 2 CH 3 ; C 1-4 hydrogen-containing fluorocarbons (e.g., HFAs) such as CHF 2 CHF 2 , CF 3 CH 2 F, CHF 2 CH 3 , and CF 3 CHFCF 3 ; and perfluorocarbons such as CF 3 CF 3 and CF 3 CF 2 CF 3 .
  • C 1-4 hydrogen-containing chlorofluorocarbons such as CH 2 ClF, CCl 2 FCHClF, CF 3 CHClF, CHF 2 CClF 2 , CHClFCHF 2 , CF 3 CH 2 Cl, and CClF 2 CH 3
  • C 1-4 hydrogen-containing fluorocarbons
  • fluorocarbons or classes of fluorinated compounds, that may be used as suspension media include, but are not limited to, fluoroheptane, fluorocycloheptane, fluoromethylcycloheptane, fluorohexane, fluorocyclohexane, fluoropentane, fluorocyclopentane, fluoromethylcyclopentane, fluorodimethyl-cyclopentanes, fluoromethylcyclobutane, fluorodimethylcyclobutane, fluorotrimethyl-cyclobutane, fluorobutane, fluorocyclobutane, fluoropropane, fluoroethers, fluoropolyethers and fluorotriethylamines. These compounds may be used alone or in combination with more volatile propellants.
  • chlorofluorocarbons and substituted fluorinated compounds may also be used as suspension media.
  • FC-11 CCl 3 F
  • FC-11B1 CBrCl 2 F
  • FC-11B2 CBr 2 ClF
  • FC12B2 CF 2 Br 2
  • FC21 CHCl 2 F
  • FC21B1 CHBrClF
  • FC-21B2 CHBr 2 F
  • FC-31B1 CH 2 BrF
  • FC113A CCl 3 CF 3
  • FC-132 CHClFCHClF
  • FC-133 CHClFCHF 2
  • FC-141 CH 2 Cl
  • FC-152 CH 2 F
  • the suspension medium may be formed of a single propellant. In other embodiments, a combination of propellants may be used to form the suspension medium. In some embodiments, relatively volatile compounds may be mixed with lower vapor pressure components to provide suspension media having specified physical characteristics selected to improve stability or enhance the bioavailability of the dispersed active agent. In some embodiments, the lower vapor pressure compounds will comprise fluorinated compounds (e.g., fluorocarbons) having a boiling point greater than about 25° C.
  • fluorinated compounds e.g., fluorocarbons
  • lower vapor pressure fluorinated compounds for use in the suspension medium may include perfluorooctylbromide C 8 F 17 Br (PFOB or perflubron), dichlorofluorooctane C 8 F 16 Cl 2 , perfluorooctylethane C 8 F 17 C 2 H 5 (PFOE), perfluorodecylbromide C 10 F 21 Br (PFDB) or perfluorobutylethane C 4 F 9 C 2 H 5 .
  • these lower vapor pressure compounds are present in a relatively low level. Such compounds may be added directly to the suspension medium or may be associated with the suspending particles.
  • the suspension medium may be formed of a propellant or propellant system that is substantially free of additional materials, including, for example, antisolvents, solubilizing agents, cosolvents or adjuvants.
  • additional materials including, for example, antisolvents, solubilizing agents, cosolvents or adjuvants.
  • additional materials such as, for example, one or more of an appropriate antisolvent, solubilizing agents, cosolvent or adjuvant may be added, for example, to adjust vapor pressure, stability, or solubility of suspended particles.
  • the suspension medium may contain a volatile fluorocarbon.
  • PVP polyvinylpyrrolidone
  • PEG polyethylene glycol
  • the propellant may comprise a volatile cosolvent or adjuvant such as a hydrocarbon or fluorocarbon.
  • the suspension medium may comprise less than about 0.01%, 0.1%, or 0.5% w/w cosolvent or adjuvant.
  • PVP or PEG are included in the suspension medium, such constituents may be included at up to about 1% w/w, or they may comprise less than about 0.01%, 0.1%, or 0.5% w/w of the suspension medium.
  • the active agent particles included in the co-suspensions described herein are formed of a material capable of being dispersed and suspended within the suspension medium and are sized to facilitate delivery of respirable particles from the co-suspension.
  • the active agent particles are provided as a micronized material wherein at least 90% of the active agent particles by volume exhibit an optical diameter of about 7 ⁇ m or less.
  • the active agent particles are provided as a micronized material wherein at least 90% of the active agent particles by volume exhibit an optical diameter selected from a range of about 7 ⁇ m to about 1 ⁇ m, about 5 ⁇ m to about 2 ⁇ m, and about 3 ⁇ m to about 2 ⁇ m.
  • the active agent particles are provided as a micronized material wherein at least 90% of the active agent particles by volume exhibit an optical diameter selected from 6 ⁇ m or less, 5 ⁇ m or less, 4 ⁇ m or less, or 3 ⁇ m or less. In another embodiment, the active agent particles are provided as a micronized material wherein at least 50% of the active agent particle material by volume exhibits an optical diameter of about 4 ⁇ m or less. In further embodiments, the active agent particles are provided as a micronized material wherein at least 50% of the active agent particle material by volume exhibits an optical diameter selected from about 3 ⁇ m or less, about 2 ⁇ m or less, about 1.5 ⁇ m or less, and about 1 ⁇ m or less.
  • the active agent particles are provided as a micronized material wherein at least 50% of the active agent particles by volume exhibit an optical diameter selected from a range of about 4 ⁇ m to about 1 ⁇ m, about 3 ⁇ m to about 1 ⁇ m, about 2 ⁇ m to about 1 ⁇ m, about 1.3 ⁇ m, and about 1.9 ⁇ m.
  • the active agent particles may be formed entirely of active agent or they may be formulated to include one or more active agents in combination with one or more excipients or adjuvants.
  • an active agent present in the active agent present in the active agent particles may be entirely or substantially crystalline.
  • the active agent particles may include an active agent present in both crystal and amorphous states.
  • the active agent particles may include an active agent present in substantially an amorphous state.
  • at least one such active agent may be present in crystalline or substantially crystalline form and at least another active agent may be present in an amorphous state.
  • each such active agent may be present in crystalline or substantially crystalline form.
  • the active agent particles described herein include one or more active agents in combination with one or more excipients or adjuvants, the excipients and adjuvants can be selected based on the chemical and physical properties of the active agent used.
  • suitable excipients for formulation of active agent particles include those described herein in association with the suspending particles.
  • the active agent particles may be formulated with one or more of the lipid, phospholipid, carbohydrate, amino acid, organic salt, peptide, protein, alditols, synthetic or natural polymer, or surfactant materials as described, for example, in association with the suspending particles.
  • At least one of the active agents is included in active agent particles co-suspended with suspending particles, while at least one other active agent may be included in suspending particles utilized in the co-suspension.
  • one or more active agents may be added to a solution of one or more of the lipid, phospholipid, carbohydrate, amino acid, organic salt, peptide, protein, alditols, synthetic or natural polymer, or surfactant materials and spray-dried to form one or more different species of suspending particle that contain the active agent within the material forming the suspending particle.
  • Any suitable process may be employed to achieve micronized active agent material for inclusion in the compositions described herein.
  • a variety of processes may be used to create active agent particles suitable for use in the co-suspension formulations described herein, including, but not limited to, micronization by milling or grinding processes, crystallization or recrystallization processes, and processes using precipitation from supercritical or near-supercritical solvents, spray drying, spray freeze drying, or lyophilization.
  • Patent references teaching suitable methods for obtaining micronized active agent particles include, for example, in U.S. Pat. No. 6,063,138, U.S. Pat. No. 5,858,410, U.S. Pat. No. 5,851,453, U.S. Pat. No. 5,833,891, U.S. Pat. No.
  • active agent particles include active agent material formulated with one or more excipient or adjuvant
  • micronized active agent particles can be formed using one or more of the preceding processes and such processes can be utilized to achieve active agent particles having a desired size distribution and particle configuration.
  • the active agent particles may be provided in any suitable concentration within the suspension medium.
  • the active agent included in the active agent particles is substantially insoluble in the suspension medium.
  • the active agent despite being substantially insoluble, exhibits measurable solubility in the suspension medium.
  • the compositions described herein work to preserve the physical stability of such active agents.
  • an active agent included in the compositions described herein may exhibit sufficient solubility in the suspension medium such that as much as 5% of the total active agent mass dissolves in the suspension medium.
  • the solubility of an active agent may result in dissolution of as much as 1% of the total active agent mass in the suspension medium.
  • the solubility of an active agent may result in dissolution of as much as 0.5% of the total active agent mass in the suspension medium. In yet another embodiment, the solubility of an active agent may result in dissolution of as much as 0.05% of the total active agent mass in the suspension medium. In still another embodiment, the solubility of an active agent may result in dissolution of as much as 0.025% of the total active agent mass in the suspension medium.
  • a variety of therapeutic or prophylactic agents can be incorporated into the co-suspension compositions disclosed herein.
  • Exemplary active agents include those that may be administered in the form of aerosolized medicaments, and active agents suitable for use in the compositions described herein include those that may be presented in a form or formulated in a manner which is dispersible within the selected suspension medium (e.g., is substantially insoluble or exhibits a solubility in the suspension medium that substantially maintains a co-suspension formulation), is capable of forming a co-suspension with the suspending particles, and is subject to respirable uptake in physiologically effective amounts.
  • the active agents that may be utilized in forming the active agent particles described herein can have a variety of biological activities.
  • Examples of specific active agents that may be included in a composition according to the present description may for example, short-acting beta agonists, e.g., bitolterol, carbuterol, fenoterol, hexoprenaline, isoprenaline (isoproterenol), levosalbutamol, orciprenaline (metaproterenol), pirbuterol, procaterol, rimiterol, salbutamol (albuterol), terbutaline, tulobuterol, reproterol, ipratropium and epinephrine; long-acting ⁇ 2 adrenergic receptor agonist (“LABA”), e.g., bambuterol, clenbuterol, formoterol, and salmeterol; ultra long-acting ⁇ 2 adrenergic receptor agonists, e.g., carmoterol, milveterol, indacaterol, and saligen
  • fluticasone propionate beclomethasone dipropionate, flunisolide, budesonide, tripedane, cortisone, prednisone, prednisilone, dexamethasone, betamethasone, or triamcinolone acetonide; antitussives, e.g., noscapine; bronchodilators, e.g., ephedrine, adrenaline, fenoterol, formoterol, isoprenaline, metaproterenol, salbutamol, albuterol, salmeterol, terbutaline; and muscarinic antagonists, including long-acting muscarinic antagonists (“LAMA”), e.g., glycopyrrolate, dexipirronium, scopolamine, tropicamide, pirenzepine, dimenhydrinate, tiotropium, darotropium, aclidinium, trospium, ipatropium, at
  • the active agents provided in the composition may be used in the form of salts (e.g., alkali metal or amine salts or as acid addition salts) or as esters, solvates (hydrates), derivatives, or a free base thereof.
  • the active agents may be in any crystalline form or isomeric form or mixture of isomeric forms, for example, as pure enantiomers, a mixture of enantiomers, as racemates or as mixtures thereof.
  • the form of the active agents may be selected to optimize the activity and/or stability of the active agent and/or to minimize the solubility of the active agent in the suspension medium.
  • the active agent included in the compositions described herein may be selected from one or more potent or highly potent active agents.
  • the compositions described herein may include one or more potent active agents that are to be delivered at a dose selected from between about 100 ⁇ g and about 100 mg, about 100 ⁇ g and about 10 mg, and about 100 ⁇ g and 1 mg per actuation of an MDI.
  • compositions described herein may include one or more potent or highly potent active agents that are to be delivered at a dose selected from up to about 80 ⁇ g, up to about 40 ⁇ g, up to about 20 ⁇ g, or between about 10 ⁇ g and about 100 ⁇ g per actuation of an MDI. Additionally, in certain embodiments, the compositions described herein may include one or more highly potent active agents that are to be delivered at a dose selected from between about 0.1 and about 2 ⁇ g, about 0.1 and about 1 ⁇ g, and about 0.1 and about 0.5 ⁇ g per actuation of an MDI.
  • a composition as described herein may, if desired, contain a combination of two or more active agents.
  • a combination of two or more species of active agent particles may be co-suspended with a single species of suspending particles.
  • a composition may include two or more species of active agent particles co-suspended with two or more different species of suspending particles.
  • a composition as described herein may include two or more active agents combined within a single species of active agent particle.
  • the active agent particles are formulated using one or more excipients or adjuvants in addition to the active agent material, such active agent particles may include individual particles that include two or more different active agents.
  • the active agent included in the compositions described herein is a LAMA active agent.
  • the LAMA active agent may be selected from, for example, glycopyrrolate, dexipirronium, tiotropium, trospium, aclidinium, darotropium, including any pharmaceutically acceptable salts, esters, isomers or solvates thereof.
  • Glycopyrrolate can be used to treat inflammatory or obstructive pulmonary diseases and disorders such as, for example, those described herein.
  • glycopyrrolate acts as a bronchodilator and provides an antisecretory effect, which is a benefit for use in the therapy of pulmonary diseases and disorders characterized by increased mucus secretions.
  • Glycopyrrolate is a quaternary ammonium salt.
  • glycopyrrolate may be used in the form of salts (e.g. alkali metal or amine salts, or as acid addition salts) or as esters or as solvates (hydrates).
  • glycopyrrolate may be in any crystalline form or isomeric form or mixture of isomeric forms, for example a pure enantiomer, a mixture of enantiomers, a racemate or a mixture thereof.
  • the form of glycopyrrolate may be selected to optimize the activity and/or stability of glycopyrrolate and/or to minimize the solubility of glycopyrrolate in the suspension medium.
  • Suitable counter ions are pharmaceutically acceptable counter ions including, for example, fluoride, chloride, bromide, iodide, nitrate, sulfate, phosphate, formate, acetate, trifluoroacetate, propionate, butyrate, lactate, citrate, tartrate, malate, maleate, succinate, benzoate, p-chlorobenzoate, diphenyl-acetate or triphenylacetate, o-hydroxybenzoate, p-hydroxybenzoate, 1-hydroxynaphthalene-2-carboxylate, 3-hydroxynaphthalene-2-carboxylate, methanesulfonate and benzenesulfonate.
  • the bromide salt of glycopyrrolate namely 3-[(cyclopentyl-hydroxyphenylacetyl)oxy]-1,1-dimethylpyrrolidinium bromide, is used and can be prepared according to the procedures set out in U.S. Pat. No. 2,956,062.
  • compositions described herein include glycopyrrolate
  • the compositions may include sufficient glycopyrrolate to provide a target delivered dose selected from between about 10 ⁇ g and about 200 ⁇ g per actuation of an MDI, about 15 ⁇ g and about 150 ⁇ g per actuation of an MDI, and about 18 ⁇ g and 144 ⁇ g per actuation of an MDI.
  • the formulations include sufficient glycopyrrolate to provide a dose selected from up to about 200 ⁇ g, up to about 150 ⁇ g, up to about 75 ⁇ g, up to about 40 ⁇ g, or up to about 20 ⁇ g per actuation.
  • the formulations include sufficient glycopyrrolate to provide a dose selected from about 18 ⁇ g per actuation, 36 ⁇ g per actuation or about 72 ⁇ g per actuation.
  • the amount of glycopyrrolate included in the compositions may be selected from, for example, between about 0.04 mg/mL and about 2.25 mg/mL.
  • tiotropium including any pharmaceutically acceptable salts, esters, isomers or solvates thereof, may be selected as a LAMA active agent for inclusion in a composition as described herein.
  • Tiotropium is a known, long-acting anticholinergic drug suitable for use in treating diseases or disorders associated with pulmonary inflammation or obstruction, such as those described herein.
  • Tiotropium, including crystal and pharmaceutically acceptable salt forms of tiotropium is described, for example, in U.S. Pat. No. 5,610,163, U.S. Pat. No. RE39,820, U.S. Pat. No. 6,777,423, and U.S. Pat. No. 6,908,928.
  • the compositions described herein include tiotropium
  • the compositions may include sufficient tiotropium to provide a delivered dose selected from between about 2.5 ⁇ g and about 50 ⁇ g, about 4 ⁇ g and about 25 ⁇ g per actuation, and about 2.5 ⁇ g and about 20 ⁇ g, about 10 ⁇ g and about 20 ⁇ g, and about 2.5 ⁇ g and about 10 ⁇ g per actuation of an MDI.
  • the formulations include sufficient tiotropium to provide a delivered dose selected from up to about 50 ⁇ g, up to about 20 ⁇ g, up to about 10 ⁇ g, up to about 5 ⁇ g, or up to about 2.5 ⁇ g per actuation of an MDI.
  • the formulations include sufficient tiotropium to provide a delivered dose selected from about 3 ⁇ g, 6 ⁇ g, 9 ⁇ g, 18 ⁇ g, and 36 ⁇ g per actuation of the MDI.
  • the amount of tiotropium included in the compositions may be selected from, for example, between about 0.01 mg/mL and about 0.5 mg/mL.
  • compositions described herein include a LABA active agent.
  • a LABA active agent can be selected from, for example, bambuterol, clenbuterol, formoterol, salmeterol, carmoterol, milveterol, indacaterol, and saligenin- or indole-containing and adamantyl-derived ⁇ 2 agonists, and any pharmaceutically acceptable salts, esters, isomers or solvates thereof.
  • formoterol is selected as the LABA active agent.
  • Formoterol can be used to treat inflammatory or obstructive pulmonary diseases and disorders such as, for example, those described herein.
  • Formoterol has the chemical name ( ⁇ )-2-hydroxy-5-[(1RS)-1-hydroxy-2-[[(1RS)-2-(4-methoxyphenyl)-1-methylethyl]-amino]ethyl]formanilide, and is commonly used in pharmaceutical compositions as the racemic fumarate dihydrate salt.
  • formoterol may be used in the form of salts (e.g. alkali metal or amine salts or as acid addition salts) or as esters or as solvates (hydrates).
  • the formoterol may be in any crystalline form or isomeric form or mixture of isomeric forms, for example a pure enantiomer, a mixture of enantiomers, a racemate or a mixture thereof.
  • the form of formoterol may be selected to optimize the activity and/or stability of formoterol and/or to minimize the solubility of formoterol in the suspension medium.
  • salts of formoterol include, for example, salts of inorganic acids such as hydrochloric, hydrobromic, sulfuric and phosphoric acids, and organic acids such as fumaric, maleic, acetic, lactic, citric, tartaric, ascorbic, succinic, glutaric, gluconic, tricarballylic, oleic, benzoic, p-methoxybenzoic, salicylic, o- and p-hydroxybenzoic, p-chlorobenzoic, methanesulfonic, p-toluenesulfonic and 3-hydroxy-2-naphthalene carboxylic acids. Hydrates of formoterol are described, for example, in U.S. Pat. No.
  • the formoterol material utilized to form the formoterol particles is formoterol fumarate, and in one such embodiment, the formoterol fumarate is present in the dihydrate form.
  • the compositions described herein include formoterol
  • the compositions described herein may include formoterol at a concentration that achieves a targeted delivered dose selected from between about 1 ⁇ g and about 30 ⁇ g, about 1 ⁇ g and about 10 ⁇ g, about 2 ⁇ g and 5 ⁇ g, about 2 ⁇ g and about 10 ⁇ g, about 5 ⁇ g and about 10 ⁇ g, and 3 ⁇ g and about 30 ⁇ g per actuation of an MDI.
  • the compositions described herein may include formoterol in an amount sufficient to provide a targeted delivered dose selected from up to about 30 ⁇ g, up to about 10 ⁇ g, up to about 5 ⁇ g, up to about 2.5 ⁇ g, up to about 2 ⁇ g, or up to about 1.5 ⁇ g per actuation.
  • the amount of formoterol included in the compositions may be selected from, for example, between about 0.01 mg/mL and about 1 mg/mL, between about 0.01 mg/mL and about 0.5 mg/mL, and between about 0.03 mg/mL and about 0.4 mg/mL.
  • the active agent may be salmeterol, including any pharmaceutically acceptable salts, esters, isomers or solvates thereof.
  • Salmeterol can be used to treat inflammatory or obstructive pulmonary diseases and disorders such as, for example, those described herein.
  • Salmeterol, pharmaceutically acceptable salts of salmeterol, and methods for producing the same are described, for example, in U.S. Pat. No. 4,992,474, U.S. Pat. No. 5,126,375, and U.S. Pat. No. 5,225,445.
  • compositions described herein may include salmeterol at a concentration that achieves a delivered dose selected from between about 2 ⁇ g and about 120 ⁇ g, about 4 ⁇ g and about 40 ⁇ g, about 8 ⁇ g and 20 ⁇ g, about 8 ⁇ g and about 40 ⁇ g, about 20 ⁇ g and about 40 ⁇ g, and 12 ⁇ g and about 120 ⁇ g per actuation of an MDI.
  • the compositions described herein may include salmeterol in an amount sufficient to provide a delivered dose selected from up to about 120 ⁇ g, up to about 40 ⁇ g, up to about 20 ⁇ g, up to about 10 ⁇ g, up to about 8 ⁇ g, or up to about 6 ⁇ g per actuation of an MDI.
  • the amount of salmeterol included in the compositions may be selected from, for example, between about 0.04 mg/mL and about 4 mg/mL, between about 0.04 mg/mL and about 2.0 mg/mL, and between about 0.12 mg/mL and about 0.8 mg/mL.
  • compositions described herein may include sufficient salmeterol to provide a target delivered dose selected from between about 4 ⁇ g and about 120 ⁇ g, about 20 ⁇ g and about 100 ⁇ g, and between about 40 ⁇ g and about 120 ⁇ g per actuation of an MDI.
  • the compositions described herein may include sufficient salmeterol to provide a targeted delivered dose selected from up to about 100 ⁇ g, up to about 40 ⁇ g, or up to about 15 ⁇ g per actuation of an MDI.
  • compositions described herein include a corticosteroid.
  • active agents may be selected from, for example, beclomethasone, budesonide, ciclesonide, flunisolide, fluticasone, methyl-prednisolone, mometasone, prednisone and trimacinolone.
  • mometasone may be selected.
  • Mometasone, pharmaceutically acceptable salts of mometasone, such as mometasone furoate, and preparation of such materials are known and described, for example, in U.S. Pat. No. 4,472,393, U.S. Pat. No.
  • Mometasone is suitable for use in treating diseases or disorders associated with pulmonary inflammation or obstruction, such as those described herein (see, e.g., U.S. Pat. No. 5,889,015, U.S. Pat. No. 6,057,307, U.S. Pat. No. 6,057,581, U.S. Pat. No. 6,677,322, U.S. Pat. No. 6,677,323 and U.S. Pat. No. 6,365,581).
  • compositions described herein include mometasone
  • the compositions include mometasone, including any pharmaceutically acceptable salts, esters, isomers or solvates thereof, in an amount sufficient to provide a target delivered dose selected from between about 20 ⁇ g and about 400 ⁇ g, about 20 ⁇ g and about 200 ⁇ g, about 50 ⁇ g and about 200 ⁇ g, about 100 ⁇ g and about 200 ⁇ g, about 20 ⁇ g and about 100 ⁇ g, and about 50 ⁇ g and about 100 ⁇ g per actuation of an MDI.
  • compositions described herein may include mometasone, including any pharmaceutically acceptable salts, esters, isomers or solvates thereof, in an amount sufficient to provide a targeted delivered dose selected from up to about 400 ⁇ g, up to about 200 ⁇ g, or up to about 100 ⁇ g per actuation of an MDI.
  • compositions described herein include a corticosteroid selected from fluticasone and budesonide. Both fluticasone and budesonide are suitable for use in treatment of conditions associated with pulmonary inflammation or obstruction, such as those described herein.
  • Fluticasone, pharmaceutically acceptable salts of fluticasone, such as fluticasone propionate, and preparation of such materials are known, and described, for example, in U.S. Pat. No. 4,335,121, U.S. Pat. No. 4,187,301, and U.S. Pat. Pub. No. US2008125407.
  • Budesonide is also well known and described, for example, in U.S. Pat. No. 3,929,768.
  • compositions described herein may include fluticasone, including any pharmaceutically acceptable salts, esters, isomers or solvates thereof, in an amount sufficient to provide a target delivered dose selected from between about 20 ⁇ g and about 200 ⁇ g, about 50 ⁇ g and about 175 ⁇ g, and between about 80 ⁇ g and about 160 ⁇ g per actuation of an MDI.
  • the compositions described herein may include fluticasone, including any pharmaceutically acceptable salts, esters, isomers or solvates thereof, in an amount sufficient to provide a targeted delivered dose selected from up to about 175 ⁇ g, up to about 160 ⁇ g, up to about 100 ⁇ g, or up to about 80 ⁇ g per actuation of an MDI.
  • compositions described herein may include budesonide, including any pharmaceutically acceptable salts, esters, isomers or solvates thereof, in an amount sufficient to provide target delivered dose selected from between about 30 ⁇ g and about 240 ⁇ g, about 30 ⁇ g and about 120 ⁇ g, and between about 30 ⁇ g and about 50 ⁇ g per actuation of an MDI.
  • the compositions described herein may include budesonide, including any pharmaceutically acceptable salts, esters, isomers or solvates thereof, in an amount sufficient to provide a targeted delivered dose selected from up to about 240 ⁇ g, up to about 120 ⁇ g, or up to about 50 ⁇ g per actuation of an MDI.
  • the co-suspension compositions described herein can be formulated to include (and deliver) a single active agent.
  • the co-suspension compositions described herein may include two or more active agents.
  • the compositions described herein may include a combination of active agents selected from a combination of a LAMA and LABA active agents, a combination of LAMA and corticosteroid active agents, and a combination of LABA and corticosteroid active agents.
  • the co-suspension compositions described herein may include three or more active agents.
  • the composition includes a combination of active agents selected from a combination of a LAMA, LABA and corticosteroid active agents.
  • a co-suspension composition as described herein may include a combination of active agents selected from a combination of formoterol and budesonide, a combination of glycopyrrolate and formoterol, a combination of ciclesonide and formoterol, a combination of budesonide and mometasone, a combination of salmeterol and fluticasone, a combination of glycopyrrolate, formoterol, and budesonide, and a combination of glycopyrrolate, formoterol, and mometasone.
  • active agents selected from a combination of formoterol and budesonide, a combination of glycopyrrolate and formoterol, a combination of ciclesonide and formoterol, a combination of budesonide and mometasone, a combination of salmeterol and fluticasone, a combination of glycopyrrolate, formoterol, and budesonide, and a combination of glycopyrrolate, formot
  • active agents may be incorporated into the suspensions disclosed herein.
  • the above list of active agents is by way of example and not limitation.
  • the suspending particles included in the co-suspension compositions described herein work to facilitate stabilization and delivery of the active agent included in the compositions.
  • the suspending particles are typically formed from pharmacologically inert material that is acceptable for inhalation and is substantially insoluble in the propellant selected.
  • the majority of suspending particles are sized within a respirable range. In particular embodiments, therefore, the MMAD of the suspending particles will not exceed about 10 ⁇ m but is not lower than about 500 nm.
  • the MMAD of the suspending particles is between about 5 ⁇ m and about 750 nm.
  • the MMAD of the suspending particles is between about 1 ⁇ m and about 3 ⁇ m.
  • the MMAD of the suspending particles is between 10 ⁇ m and 50 ⁇ m.
  • the suspending particles will typically exhibit a volume median optical diameter between about 0.2 ⁇ m and about 50 ⁇ m. In one embodiment, the suspending particles exhibit a volume median optical diameter that does not exceed about 25 ⁇ m. In another embodiment, the suspending particles exhibit a volume median optical diameter selected from between about 0.5 ⁇ m and about 15 ⁇ m, between about 1.5 ⁇ m and about 10 ⁇ m, and between about 2 ⁇ m and about 5 ⁇ m.
  • the concentration of suspending particles included in a composition according to the present description can be adjusted, depending on, for example, the amount of active agent particles and suspension medium used.
  • the suspending particles are included in the suspension medium at a concentration selected from about 1 mg/mL to about 15 mg/mL, about 3 mg/mL to about 10 mg/mL, 5 mg/mL to about 8 mg/mL, and about 6 mg/mL.
  • the suspending particles are included in the suspension medium at a concentration of up to about 30 mg/mL.
  • the suspending particles are included in the suspension medium at a concentration of up to about 25 mg/mL.
  • the relative amount of suspending particles to active agent particles is selected to achieve a co-suspension as contemplated herein.
  • a co-suspension composition may be achieved where the amount of suspending particles, as measured by mass, exceeds that of the active agent particles.
  • the ratio of the total mass of the suspending particles to the total mass of active agent particles may be between about 3:1 and about 15:1, or alternatively from about 2:1 and 8:1.
  • the ratio of the total mass of the suspending particles to the total mass of active agent particles may be above about 1, such as up to about 1.5, up to about 5, up to about 10, up to about 15, up to about 17, up to about 20, up to about 30, up to about 40, up to about 50, up to about 60, up to about 75, up to about 100, up to about 150, and up to about 200, depending on the nature of the suspending particles and active agent particles used.
  • the ratio of the total mass of the suspending particles to the total mass of the active agent particles may be selected from between about 10 and about 200, between about 60 and about 200, between about 15 and about 60, between about 15 and about 170, between about 15 and about 60, about 16, about 60, and about 170.
  • the amount of suspending particles is less than that of the active agent particles.
  • the mass of the suspending particles may be as low as 20% of the total mass of the active agent particles.
  • the total mass of the suspending particles may also approximate or equal the total mass of the active agent particles.
  • Suspending particles suitable for use in the compositions described herein may be formed of one or more pharmaceutically acceptable materials or excipients that are suitable for inhaled delivery and do not substantially degrade or dissolve in the suspension medium.
  • perforated microstructures, as defined herein may be used as the suspending particles.
  • excipients that may be used in the formulation of suspending particles described herein include but are not limited to (a) carbohydrates, e.g., monosaccharides such as fructose, galactose, glucose, D-mannose, sorbose, and the like; disaccharides, such as sucrose, lactose, trehalose, cellobiose, and the like; cyclodextrins, such as 2-hydroxypropyl- ⁇ -cyclodextrin; and polysaccharides, such as raffinose, maltodextrins, dextrans, starches, chitin, chitosan, inulin, and the like; (b) amino acids, such as alanine, glycine, arginine, aspartic acid, glutamic acid, cysteine, lysine, leucine, isoleucine, valine, and the like; (c) metal and organic salts prepared from organic acids and bases, such as sodium
  • phospholipids from both natural and synthetic sources may be used in preparing suspending particles suitable for use in the compositions described herein.
  • the phospholipid chosen will have a gel to liquid crystal phase transition of greater than about 40° C.
  • Exemplary phospholipids are relatively long chain (i.e., C 16 -C 22 ) saturated lipids and may comprise saturated phospholipids, such as saturated phosphatidylcholines having acyl chain lengths of 16 C or 18 C (palmitoyl and stearoyl).
  • Exemplary phospholipids include phosphoglycerides such as dipalmitoylphosphatidylcholine, disteroylphosphatidylcholine, diarachidoylphosphatidylcholine, dibehenoylphosphatidylcholine, diphosphatidyl glycerol, short-chain phosphatidylcholines, long-chain saturated phosphatidylethanolamines, long-chain saturated phosphatidylserines, long-chain saturated phosphatidylglycerols, and long-chain saturated phosphatidylinositols. Additional excipients are disclosed in International Patent Publication No. WO 96/32149 and U.S. Pat. Nos. 6,358,530, 6,372,258 and 6,518,239.
  • the suspending particles may be formed using one or more lipids, phospholipids or saccharides, as described herein.
  • suspending particles include one or more surfactants.
  • the use of suspending particles formed of or incorporating one or more surfactants may promote absorption of the selected active agent, thereby increasing bioavailability.
  • the suspending particles described herein, such as, for example, suspending particles formed using one or more lipids can be formed to exhibit a desired surface rugosity (roughness), which can further reduce inter-particle interactions and improve aerosolization by reducing the surface area available for particle-particle interaction.
  • a lipid that is naturally occurring in the lung could be used in forming the suspending particles, as such suspending particles that have the potential to reduce opsonization (and thereby reducing phagocytosis by alveolar macrophages), thus providing a longer-lived controlled release particle in the lung.
  • the suspending particles utilized in the compositions described herein may be selected to increase storage stability of the selected active agent, similar to that disclosed in International Patent Publication No WO 2005/000267.
  • the suspending particles my include pharmaceutically acceptable glass stabilization excipients having a Tg of at least 55° C., at least 75° C., or at least 100° C.
  • Glass formers suitable for use in compositions described herein include, but are not limited to, one or more of trileucine, sodium citrate, sodium phosphate, ascorbic acid, inulin, cyclodextrin, polyvinyl pyrrolidone, mannitol, sucrose, trehalose, lactose, and, proline.
  • suspending particles may include a calcium salt, such as calcium chloride, as described, for example, in U.S. Pat. No. 7,442,388.
  • the suspending particles may be designed, sized and shaped as desired to provide desirable stability and active agent delivery characteristics.
  • the suspending particles comprise perforated microstructures as described herein.
  • perforated microstructures may be used as suspending particles in the compositions described herein, they may be formed using one or more excipients as described herein.
  • perforated microstructures may include at least one of the following: lipids, phospholipids, nonionic detergents, nonionic block copolymers, ionic surfactants, biocompatible fluorinated surfactants and combinations thereof, particularly those approved for pulmonary use.
  • perforated microstructures include poloxamer 188, poloxamer 407 and poloxamer 338.
  • Other specific surfactants include oleic acid or its alkali salts.
  • the perforated microstructures include greater than about 10% w/w surfactant.
  • suspending particles may be prepared by forming an oil-in-water emulsion, using a fluorocarbon oil (e.g., perfluorooctyl bromide, perfluorodecalin) which may be emulsified using a surfactant such as a long chain saturated phospholipid.
  • a fluorocarbon oil e.g., perfluorooctyl bromide, perfluorodecalin
  • the resulting perfluorocarbon in water emulsion may be then processed using a high pressure homogenizer to reduce the oil droplet size.
  • the perfluorocarbon emulsion may be fed into a spray dryer, optionally with an active agent solution, if it is desirable to include active agent within the matrix of the perforated microstructures.
  • Spray drying is a one-step process that converts a liquid feed to a dried particulate form.
  • Spray drying has been used to provide powdered pharmaceutical material for various administrative routes, including inhalation.
  • Operating conditions of the spray dryer (such as inlet and outlet temperature, feed rate, atomization pressure, flow rate of the drying air and nozzle configuration) can be adjusted to produce the desired particle size producing a yield of the resulting dry microstructures.
  • Such methods of producing exemplary perforated microstructures are disclosed in U.S. Pat. No. 6,309,623 to Weers et al.
  • Perforated microstructures as described herein may also be formed through lyophilization and subsequent milling or micronization.
  • Lyophilization is a freeze-drying process in which water is sublimed from the composition after it is frozen. This process allows drying without elevated temperatures.
  • the suspending particles may be produced using a spray freeze drying process, such as is disclosed in U.S. Pat. No. 5,727,333.
  • suspending particles as described herein may include bulking agents, such as polymeric particles.
  • Polymeric polymers may be formed from biocompatible and/or biodegradable polymers, copolymers or blends.
  • polymers capable of forming aerodynamically light particles may be used, such as functionalized polyester graft copolymers and biodegradable polyanhydrides.
  • bulk eroding polymers based on polyesters including poly(hydroxy acids) can be used.
  • Polyglycolic acid (PGA), polyactic acid (PLA) or copolymers thereof may be used to form suspending particles.
  • the polyester may include a charged or functionalizable group, such as an amino acid.
  • suspending particles may be formed of poly( D,L -lactic acid) and/or poly( D,L -lactic-co-glycolic acid) (PLGA), which incorporate a surfactant such as DPPC.
  • polymer candidates for use in suspending particles may include polyamides, polycarbonates, polyalkylenes such as polyethylene, polypropylene, poly(ethylene glycol), poly(ethylene oxide), poly(ethylene terephthalate), poly vinyl compounds such as polyvinyl alcohols, polyvinyl ethers, and polyvinyl esters, polymers of acrylic and methacrylic acids, celluloses and other polysaccharides, and peptides or proteins, or copolymers or blends thereof. Polymers may be selected with or modified to have the appropriate stability and degradation rates in vivo for different controlled drug delivery applications.
  • the ratio of the total mass of the suspending particles to the total mass of the active agent particles may be selected from between about 1 and about 20, between about 2.5 and about 15, and about 2.5 and about 10. In an embodiment of a composition as described herein that includes one or more of fluticasone, mometasone, and budesonide as an active agent, the ratio of the total mass of the suspending particles to the total mass of the active agent particles may be selected from between about 1 and about 15, between about 1.5 and about 10, and between about 2.5 and about 8.
  • the ratio of the total mass of the suspending particles to the total mass of the active agent particles may be selected from between about 10 and about 30, between about 15 and about 25, and about 20.
  • the ratio of the total mass of the suspending particles to the total mass of the active agent particles may be selected from between about 10 and about 200, between about 50 and about 125, about 5 and about 50, between about 1 and about 15, between about 1.5 and about 10, and between about 2.5 and about 8.
  • compositions described herein may include two or more species of suspending particles.
  • the compositions described herein may include a single species of active agent particle and two or more species of suspending particles.
  • the compositions described herein may include two or more species of active agent particles combined with two or more species of suspending particles.
  • compositions according to the present description can include suspending particles that include one or more active agents incorporated into the suspending particles Where active agent is incorporated into suspending particles, the suspending particles will be of a respirable size and can be formulated and produced using, for example, the methods and materials described herein in association with the active agent particles, the suspending particles and the experimental Examples provided.
  • compositions formulated according to the present teachings can inhibit degradation of active agent included therein.
  • the compositions described herein inhibit one or more of flocculation, aggregation and the solution mediated transformation of active agent material included in the compositions.
  • the pharmaceutical compositions described herein are suited for respiratory delivery via and MDI in a manner that achieves desirable delivered dose uniformity (“DDU”) of each active agent included in a combination of two or more active agents, even with combinations including potent and highly potent actives.
  • DDU delivered dose uniformity
  • compositions described herein can achieve a DDU of ⁇ 30%, or better, for each active agent throughout emptying of an MDI canister.
  • compositions described herein achieve a DDU of ⁇ 25%, or better, for each active agent throughout emptying of an MDI canister. In yet another such embodiment, compositions described herein achieve a DDU for the active agent of ⁇ 20%, or better, for each active agent throughout emptying of an MDI canister.
  • compositions described herein also serve to substantially preserve FPF and FPD performance throughout emptying of an MDI canister, even after being subjected to accelerated degradation conditions. For instance, compositions according to the present description maintain as much as 80%, 90%, 95%, or more, of the original FPF and FPD performance throughout emptying of an MDI canister, even after being subjected to accelerated degradation conditions. Compositions described herein provide the added benefit of achieving such performance while being formulated using non-CFC propellants and eliminating or substantially avoiding combination effects often experienced with compositions incorporating multiple active agents.
  • compositions described herein achieve one or all of a targeted DDU, FPF and FPD performance while being formulated with suspension medium including only one or more non-CFC propellants and without the need to modify the characteristics of the non-CFC propellant, such as by the addition of, for example, one or more cosolvent, antisolvent, solubilizing agent, adjuvant or other propellant modifying material.
  • compositions formulated according to the present teachings can inhibit degradation of the active agent included therein.
  • the compositions described herein inhibit one or more of flocculation, aggregation and Ostwald ripening of the active agent(s) included in the compositions.
  • compositions described herein allow the compositions to be dispensed in a manner that achieves desirable delivered dose uniformity throughout emptying of an MDI canister (“DDU”), even where the active agent to be delivered is highly potent and the delivered dose of the active agent is selected from, for example, less than one of 100 ⁇ g, 80 ⁇ g, 40 ⁇ g, 20 ⁇ g, 10 ⁇ g, 9 ⁇ g, 8 ⁇ g, 7 ⁇ g, 6 ⁇ g, 5 ⁇ g, 4 ⁇ g, 3 ⁇ g, 2 ⁇ g, 1 ⁇ g, 0.5 ⁇ g, and 0.1 ⁇ g per actuation of the MDI.
  • DDU MDI canister
  • compositions described herein can achieve a DDU of ⁇ 30%, or better, for each of the active agents included in the composition.
  • compositions described herein achieve a DDU of ⁇ 25%, or better, for each of the active agents included in the composition.
  • compositions described herein achieve a DDU of ⁇ 20%, or better, for each of the active agents included in the composition.
  • compositions according to the present description serve to substantially preserve FPF and FPD performance throughout emptying of an MDI canister, even after being subjected to accelerated degradation conditions. For instance, compositions according to the present description maintain as much as 80%, 90%, 95%, or more, of the original FPF and FPD performance, even when they incorporate multiple active agents. Compositions described herein provide the added benefit of achieving such performance while being formulated using non-CFC propellants.
  • compositions described herein achieve desired one or all of a targeted DDU, FPF and FPD performance while being formulated with suspension medium including only one or more non-CFC propellants and without the need to modify the characteristics of the non-CFC propellant, such as by the addition of, for example, one or more cosolvent, antisolvent, solubilizing agent, adjuvant or other propellant modifying material.
  • a method of formulating a pharmaceutical composition for respiratory delivery of an active agent involves the steps of providing a suspension medium, one or more species of active agent particles and one or more species of suspending particles, as described herein, and combining such constituents to form a composition wherein active agent particles associate with the suspending particles and co-locate with the suspending particles within the suspension medium such that a co-suspension as described herein is formed.
  • the association of the active agent particles and the suspending particles is such that they do not separate due to their different buoyancies in a propellant.
  • a method of formulating a pharmaceutical composition as described herein can include providing two or more species of active agent particles in combination with one or more species of suspending particles.
  • the method may include providing two or more suspending particles in combination with one or more species of active agent particles.
  • compositions described herein support, for example, methods for forming stabilized formulations of active agents for pulmonary delivery, methods for preserving the FPF and/or FPD throughout emptying of an MDI canister, methods for pulmonary delivery of potent or highly potent active agents, and methods of achieving a DDU selected from ⁇ 30%, or better, ⁇ 25%, or better, and ⁇ 20%, or better, for potent and highly potent drugs administered through pulmonary delivery.
  • the compositions may be delivered by an MDI. Therefore, in particular embodiments of such methods, an MDI loaded with a composition described herein is obtained, and the desired active agent is administered to a patient through pulmonary delivery through actuation of the MDI.
  • the mouthpiece is inserted into a patient's mouth between the lips and teeth. The patient typically exhales deeply to empty the lungs and then takes a slow deep breath while actuating the cartridge of the MDI.
  • the specified volume of formulation travels to the expansion chamber, out the actuator nozzle and into a high-velocity spray that is drawn into the lungs of a patient.
  • the dose of active agent delivered throughout emptying of an MDI canister is not more than 20% greater than the mean delivered dose and is not less than 20% less than the mean delivered dose.
  • a suspension medium as described herein such as a suspension medium formed by an HFA propellant
  • Suspending particles are also obtained or prepared as described herein.
  • One or more species of active agent particles as described herein are also obtained, and the suspension medium, suspending particles and active agent particles are combined to form a co-suspension wherein the active agent particles associate with suspending particles and co-locate with the suspending particles within the continuous phase formed by the suspension medium.
  • co-suspensions according to the present description When compared to the active agent contained in the same suspension medium in the absence of suspending particles, co-suspensions according to the present description have been found to exhibit a higher tolerance to solution mediated transformation and irreversible crystal aggregation, and thus can lead to improved stability and dosing uniformity, allowing the formulation of active agents that are somewhat physically unstable in the suspension medium alone.
  • a respirable co-suspension as described herein is provided which is capable of maintaining the FPD and/or the FPF to within ⁇ 20%, ⁇ 10%, or even ⁇ 5% the initial FPD and/or FPF, respectively, throughout emptying of an MDI canister. Such performance can be achieved even after the co-suspension is subjected to accelerated degradation conditions.
  • a suspension medium as described herein such as a suspension medium formed by an HFA propellant, is obtained.
  • Suspending particles are also obtained or prepared as described herein.
  • One or more species of active agent particles as described herein are also obtained, and the suspension medium, suspending particles and active agent particles are combined to form a co-suspension wherein the active agent particles associate with suspending particles and co-locate with the suspending particles within the suspension medium. Even after exposure of such composition to one or more temperature cycling events, the co-suspension maintains an FPD or FPF within ⁇ 20%, ⁇ 10%, or even ⁇ 5% of the respective values measured prior to exposure of the composition to the one or more temperature cycling events.
  • Such methods include pulmonary delivery of a therapeutically effective amount of a pharmaceutical composition described herein, and in certain such embodiments, pulmonary administration of the pharmaceutical composition is accomplished by delivering the composition using an MDI.
  • compositions, methods and systems described herein can be used to treat patients suffering from a disease or disorder selected from asthma, COPD, exacerbation of airways hyper reactivity consequent to other drug therapy, allergic rhinitis, sinusitis, pulmonary vasoconstriction, inflammation, allergies, impeded respiration, respiratory distress syndrome, pulmonary hypertension, pulmonary vasoconstriction, and any other respiratory disease, condition, trait, genotype or phenotype that can respond to the administration of, for example, a LAMA, LABA, corticosteroid, or other active agent as described herein, whether alone or in combination with other therapies.
  • a disease or disorder selected from asthma, COPD, exacerbation of airways hyper reactivity consequent to other drug therapy, allergic rhinitis, sinusitis, pulmonary vasoconstriction, inflammation, allergies, impeded respiration, respiratory distress syndrome, pulmonary hypertension, pulmonary vasoconstriction, and any other respiratory disease, condition, trait, genotype or phenotype that can
  • compositions, systems and methods described herein can be used to treat pulmonary inflammation and obstruction associated with cystic fibrosis.
  • the pulmonary disease of condition is selected from those specifically described herein, and the method includes pulmonary delivery of a co-suspension composition according to the present description to the patient via an MDI, wherein the pulmonary delivery of such composition includes administering one or more active agents at a dose or dose range as described in association with the co-suspension compositions disclosed herein.
  • an MDI system includes a pressurized, liquid phase formulation-filled canister disposed in an actuator formed with a mouthpiece.
  • the MDI system may include the formulations described herein, which include a suspension medium, at least one species of active agent particles and at least one species of suspending particles.
  • the canister used in the MDI be any of any suitable configuration, and in one exemplary embodiment, the canister may have a volume ranging from about 5 mL to about 25 mL, such as, for example a canister having a 19 mL volume.
  • a metering valve including a metering chamber capable of holding a defined volume of the formulation (e.g., 63 ⁇ l or any other suitable volume available in commercially available metering valves), which is released into an expansion chamber at the distal end of the valve stem when actuated.
  • the actuator retains the canister and may also include a port with an actuator nozzle for receiving the valve stem of the metering valve. When actuated, the specified volume of formulation travels to the expansion chamber, out the actuator nozzle and into a high-velocity spray that is drawn into the lungs of a patient.
  • Active agent particles formed of glycopyrrolate (Pyrrolidinium, 3-((cyclopentylhydroxyphenylacetyl)oxy)-1,1-dimethyl-, bromide) were formed by micronizing glycopyrrolate using a jet mill.
  • the particle size distribution of the micronized glycopyrrolate (GP) was determined by laser diffraction. 50% by volume of the micronized particles exhibited an optical diameter smaller than 2.1 ⁇ m, 90% by volume were smaller than 5 ⁇ m.
  • Suspending particles were manufactured as follows: 500 mL of a fluorocarbon-in water emulsion of PFOB (perfluoroctyl bromide) stabilized by a phospholipid was prepared. 18.7 g of the phospholipid, DSPC (1,2-Distearoyl-sn-Glycero-3-Phosphocholine), and 1.3 g of calcium chloride were homogenized in 400 mL of hot water (75° C.) using a high shear mixer. 100 mL of PFOB were added slowly during homogenization. The resulting coarse emulsion was then further homogenized using a high pressure homogenizer (Model C3, Avestin, Ottawa, CA) at pressures of up to 170 MPa for 5 passes.
  • PFOB perfluoroctyl bromide
  • the emulsion was spray dried in nitrogen using the following spray drying conditions: Inlet temperature 95° C., outlet temperature 72° C., emulsion feed rate 2.4 mL/min, total gas flow 525 L/min.
  • the particle size distribution of the suspending particles was determined by laser diffraction. 50% by volume of the suspending particles were smaller than 2.9 ⁇ m, the Geometric Standard Deviation of the distribution was 1.8.
  • Metered dose inhalers were prepared by weighing the target masses of micronized GP particles and suspending particles into fluorinated ethylene polymer (FEP) coated aluminum canisters (Presspart, Blackburn, UK) with 19 mL volume.
  • FEP fluorinated ethylene polymer
  • the target masses and the target delivered dose assuming 20% actuator deposition are given in Table 1 for five different configurations (configurations 1A through 1C representing different suspensions of GP particles and suspending particles; configuration 1D representing GP particles alone; configuration 1E representing suspending particles alone).
  • the canisters were crimp sealed with 63 ⁇ l valves (# BK 357, Bespak, King's Lynn, UK) and filled with 12.4 g of HFA 134a (1,1,1,2-tetrafluoroethane) (Ineos Fluor, Lyndhurst, UK) by overpressure through the valve stem. After injecting the propellant, the canisters were sonicated for 15 seconds and agitated on a wrist action shaker for 30 minutes. The canisters were fitted with polypropylene actuators with a 0.3 mm orifice (# BK 636, Bespak, King's Lynn, UK). Additional inhalers for visual observation of suspension quality were prepared using glass vials.
  • Aerosol performance was assessed shortly after manufacturing in accordance with USP ⁇ 601>(United States Pharmacopeia Monograph 601).
  • a Next Generation Impactor (NGI) operated at a flow rate of 30 L/min was used for determination of particle size distribution.
  • Sample canisters were seated into an actuator with two waste actuations and two additional waste priming actuations. Five actuations were collected in the NGI with a USP throat attached.
  • the valve, actuator, throat, NGI cups, stages, and filter were rinsed with volumetrically dispensed solvent.
  • the sample solutions were assayed using a drug specific chromatographic method.
  • the fine particle fraction was defined using the sum of stages 3 through filter.
  • Delivered dose uniformity through use testing was performed using a Dose Uniformity Sampling Apparatus as described in USP ⁇ 601>. Inhalers were seated and primed as described before. Two actuations were collected and assayed at beginning, middle and end of use.
  • the co-suspended configurations achieved a delivered dose within 10% of target
  • the GP particles suspended alone showed much higher variability in delivered dose in a range significantly below target.
  • the fine particle fraction relative to configuration 1D was improved by more than 50%.
  • the MMADs of the co-suspended configurations were acceptable and depended on the suspension concentration of the suspending particles.
  • the delivered dose uniformity through use was tested for configurations 1B and 1C. All individual delivered doses were within ⁇ 20% of mean. The results showed that the drug crystals forming the GP particles associate to the suspending particles, a co-suspension was formed, and the aerosol performance of the co-suspension was mostly determined by the suspending particles.
  • Glycopyrrolate (GP) particles were formed by micronization using a jet mill. Suspending particles were manufactured as described in Example 1. The particle size distribution of the micronized GP was determined by laser diffraction. 50% by volume of the micronized particles exhibited an optical diameter smaller than 1.7 ⁇ m, 90% by volume exhibited an optical diameter smaller than 4.1 ⁇ m. Five different lots of metered dose inhalers were different lots were made. For configurations 2A, 2B and 2C the total concentration of DSPC, CaCl 2 , and GP in the feedstock was 40 mg/mL, for configuration 2D and 2E this concentration was doubled.
  • Metered dose inhalers were prepared by weighing the target masses of GP particles and suspending particles into canisters as described in Example 1. No further excipients were used.
  • the target masses were 4 mg/canister for GP particles and 60 mg/canister for the suspending particles, resulting in a suspending particle to GP particle ratio of 15 for configurations 2A and 2D.
  • the target masses were 5.1 mg/canister for GP particles and 51 mg/canister for the suspending particles, resulting in a suspending particle to GP particle ratio of 10 for configuration 2B.
  • the target masses were 8 mg/canister for GP particles and 60 mg/canister for the suspending particles, resulting in a suspending particle to GP particle ratio of 7.5 for configurations 2C and 2E.
  • Propellant and container closure system were as described in Example 1.
  • the GP crystals were placed in HFA 134a in a canister under pressure and were equilibrated for 3 weeks at room temperature to determine their solubility in the propellant.
  • the samples were filtered under pressure at ambient temperature through filters with a pore width of 0.22 ⁇ m.
  • the filtrate was evaporated and the GP dissolved in methanol and chromatographically analyzed.
  • a solubility of 0.17 ⁇ 0.07 ⁇ g/g was found. Using this value it was determined that 2.1 ⁇ g or 0.05% of GP present in the canister dissolved in the propellant.
  • Previous articles teach that microcrystalline material with a measurable solubility in the propellant will not be physically stable due to solution mediated transformation [N. C.
  • the filled metered dose inhalers were stored valve down without overwrap at two different conditions: 1) refrigerated at 5° C.; and 2) room temperature at 25° C./60% RH. Aerosol performance and delivered dose uniformity tests as described in Example 1 were carried out at different time points. The results, which are summarized in Table 2, show a stable fine particle fraction at refrigerated and room temperature conditions.
  • Configurations 2C and 2E were subjected to a temperature cycling test.
  • the canisters were subjected to ⁇ 5° C. and 40° C. alternating between temperatures every 6 hours for a total duration of twelve weeks.
  • Fine particle fraction was 53% for both configurations at the beginning of the study.
  • the FPF was unchanged, i.e. at 55% for configuration 2C and at 53% for configuration 2E.
  • FIGS. 1 and 2 show the aerosol particle size distributions as measured by the NGI for configurations 2A and 2B, respectively. Also shown are the amounts of drug recovered from actuator, and from the induction port (throat) and its mouth piece adaptor. Recovered masses are expressed as percent of nominal dose.
  • aerodynamic particle size distribution individual replicates are shown at 4, 8 and 12 weeks and at 8, 12 and 24 week for configuration 2B. Though there is a measurable fraction of the suspended GP dissolved in the propellant, there is no evidence of a coarsening of the size distributions. Moreover, as evidenced by these Examples, the aerosol performance of a co-suspension at suitable suspending particle to GP ratios is determined largely by the suspending particles.
  • Example 1 Several similar batches of suspending particles were made as described in Example 1. The suspending particles were combined with glycopyrrolate (GP) particles that were micronized to different extents, using two different types of jet mills with various milling parameters. The optical diameter and particle size distribution of the micronized GP particles was determined by laser diffraction. Table 3 lists the d 50 and d 90 values for the different lots of micronized material used. d 50 and d 90 denote the particle size at which the cumulative volume distribution reported by the particle sizing instrument reaches 50% and 90% respectively.
  • GP glycopyrrolate
  • Example 1 Twelve different lots of metered dose inhalers were prepared as described in Example 1. In all cases the suspension concentration of GP particles in HFA 134a was in the range of 0.32-0.45 mg/mL and the suspension concentration of the suspending particles was in the range of 5.8-6.1 mg/mL. The configurations were deemed similar enough to pool the data for a meta-analysis presented in this Example.
  • the filled metered dose inhalers were stored valve down without overwrap at two different conditions: refrigerated at 5° C. and controlled room temperature at 25° C./60% RH. Aerosol performance tests as described in Example 1 were carried out at different time points. The results did not show any statistically significant trend as a function of time up to twelve weeks of storage. No difference between room temperature storage and refrigerated storage was discernible. Hence, results from different stress conditions and time points were pooled to determine how the particle size distribution of the micronized material affects aerosol performance.
  • Table 3 summarizes the MMAD results of the meta-analysis.
  • the first column describes the six different configurations.
  • the second column identifies how many individual lots were used in the compilation of the data for the respective configuration.
  • the third column lists the number of individual MMAD determinations used to calculate the average MMAD for the respective configuration.
  • Columns four and five show the d 90 and d 50 of the micronized material used to manufacture the co-suspensions. The results are sorted by d 90 value from coarse to fine. The last two columns display the average MMAD and standard deviation.
  • Micronized glycopyrrolate (GP) particles were formed tested as described in Example 1. The optical diameter of the micronized GP particles was determined and 50% by volume of the micronized GP particles were smaller than 1.7 ⁇ m, 90% by volume were smaller than 3.8 ⁇ m.
  • Example 2 Five batches of suspending particles were made as described in Example 1. The batches differed in concentration, C F , and volume fraction of PFOB, V PFOB , of the feed emulsion prior to spray drying, ranging from 20 mg/mL to 160 mg/mL and 20% to 40%, respectively. The different configurations are described in Table 4.
  • Metered dose inhalers were prepared by weighing the target masses of micronized GP and suspending particles into coated glass vials with 15 mL volume. The target suspension concentrations and suspending particle to GP ratios are given in Table 4 for the 26 different vials tested.
  • the canisters were crimp sealed with 63 ⁇ l valves (Valois, Les Vaudreuil, France) and filled with 10 g or 12 g of HFA 134a (1,1,1,2-tetrafluoroethane) (Ineos Fluor, Lyndhurst, UK) by overpressure through the valve stem. After injecting the propellant, the canisters were sonicated for 15 seconds and agitated on a wrist action shaker for 30 minutes.
  • micronized GP particles formulated alone flocculated and sedimented quickly As described in Example 1, micronized GP particles formulated alone flocculated and sedimented quickly.
  • the glass vials in this example were left to settle for at least 24 h without agitation and then it was tested by visual observation whether the crystal, GP particles were co-suspended completely.
  • no GP particles were observed at the bottom of the vials, except for very few foreign particulates in some vials. Occasional foreign particles were also visible in a similar very low amount in vials filled with suspending particles only.
  • Partial a fraction of the GP particles was visible at the bottom of the vial.
  • Glycopyrrolate (GP) particles were micronized with a jetmill and tested as described in Example 1. 50% by volume of the micronized particles exhibited an optical diameter smaller than 1.7 ⁇ m, 90% by volume exhibited an optical diameter smaller than 4.4 ⁇ m.
  • Configuration 5A was spray dried from an emulsion.
  • Configuration 5B was manufactured in a similar fashion but using dipalmitoylphosphatidylcholine (DPPC) instead of DSPC.
  • Configuration 5C was spray dried from an ethanolic solution.
  • DPPC dipalmitoylphosphatidylcholine
  • Configuration 5D, 5E, and 5F saccharides were spray dried from aqueous solution.
  • the spray drying parameters for all configurations are given in Table 5a.
  • the particle size distribution of the suspending particles was determined by laser diffraction.
  • the volume median optical diameter, VMD, and geometric standard deviation, GSD, for the different configurations are given in Table 5b.
  • Electron micrographs of the suspending particles showed a variety of morphologies, summarized in FIG. 3 .
  • Configuration 5E had the smallest particles, as expected due to its low feed concentration.
  • Metered dose inhalers were prepared by weighing the 4 mg of micronized GP particles and 60 mg of suspending particles into coated glass vials with 15 mL volume.
  • the canisters were crimp sealed with 63 ⁇ l valves (Valois DF30/63 RCU, Les Vaudreuil, France) and filled with 9.5 mL of HFA 134a (Ineos Fluor, Lyndhurst, UK) by overpressure through the valve stem. After injecting the propellant, the canisters were sonicated for 15 seconds and agitated on a wrist action shaker for 30 minutes. Additional inhalers with suspending particles only were manufactured as control for each configuration.
  • Example 5A, 5B, and 5C have true densities lower than the propellant. They formed a cream layer and were tested for the presence of a co-suspension as described in Example 4. No GP particles were visible at the bottom of the vials for configuration 5A and 5B. Configuration 5C formed a partial co-suspension.
  • the saccharide particles sediment because they have a higher true density than the propellant.
  • all control vials for the saccharide configurations showed a significantly faster sedimentation rate than micronized GP particles alone.
  • the sedimentation rate was similar to that of the control vials with the suspending particles alone and faster than the micronized GP particles alone, demonstrating the association of the GP crystals with the suspending particles.
  • a co-suspension was formed in these cases.
  • FIG. 4 shows an example of this behavior for configuration 5D.
  • the glass vial was observed one minute after agitation.
  • the co-suspension has already settled leaving a clear propellant layer, while in the control containing GP particles alone, most of the crystals are still suspended in the propellant.
  • Glycopyrrolate (GP) was micronized using a jet mill to a volume median optical diameter (d 50 ) of 1.4 ⁇ m with 90% of the cumulative distribution (d 90 ) having a volume optical diameter below 3.0 ⁇ m.
  • Suspending particles were manufactured similarly to those in Example 1.
  • MDI canisters were manufactured using FEP coated canisters (Presspart, Blackburn, UK) to provide products with metered dose of 5.5 ⁇ g per actuation GP and 44 ⁇ g per actuation GP which correlates to approximately 4.5 ⁇ g per actuation and 36 ⁇ g per actuation GP delivered dose from a 50 ⁇ l EPDM valves (Bespak, King's Lynn, UK).
  • the formulations contained 6 mg/mL of suspending particles.
  • MDI manufacturing was accomplished using a drug addition vessel (DAV) by first adding half of suspending particle quantity, next filling the microcrystalline GP, and lastly adding the remaining half of suspending particles to the top. Materials were added to the vessel in a humidity controlled environment of ⁇ 10% RH. The DAV was then connected to a 4 L suspension vessel and flushed with HFA 134a propellant and then mixed. The temperature inside the vessel was maintained at 21-23° C. throughout the entire batch production. After recirculation of the batch for 30 min canisters were filled with the suspension mixture through the valve. Sample canisters were then selected at random for total canister assay to ensure correct formulation quantities. The freshly manufactured co-suspension MDI batch was then placed on one week quarantine before initial product performance analysis.
  • DAV drug addition vessel
  • canisters from each lot were subjected to a temperature cycling stability study.
  • the canisters were subjected to ⁇ 5° C. and 40° C. alternating between temperatures every 6 hours for a total duration of 84 cycles (3 weeks) and 168 cycles (6 weeks).
  • NGI Next Generation Impactor
  • FIGS. 5 and 6 The initial and temperature cycled aerodynamic particle size distributions as measured by the NGI are shown in FIGS. 5 and 6 . Also shown are the amounts of drug recovered from valve stem and actuator (denoted as actuator), and from the induction port (throat) and its mouth piece adaptor. Recovered masses are expressed as percent of nominal dose. After 168 cycles, the % FPF (ex-actuator) is not significantly different from initial. A summary of the stability of the fine particle fraction is shown in Table 6. The fine particle fraction remained unchanged over 168 cycles, illustrating the stability of the GP co-suspensions disclosed herein across a GP dose range.
  • FIGS. 7 and 8 The delivered dose through life of the MDI canisters is shown in FIGS. 7 and 8 . No change in delivered dose from beginning to middle of can is observed and a ⁇ 10% increase from middle to end of canister. The change from middle to end is anticipated based upon evaporative losses of propellant as the can is emptied.
  • FIGS. 7 and 8 demonstrate desirable delivered dose uniformity for MDI for doses as low as 4.5 ⁇ g per actuation.
  • MDI Canisters were manufactured to contain 6 mg/mL suspending particle concentration and to provide a metered dose of 36 ⁇ g per actuation with a 50 ⁇ l valve volume according to Example 6.
  • Micronized GP had a d 50 and d 90 of 1.6 ⁇ m and 4.1 ⁇ m respectively and suspending particles were manufactured similarly to the process described in Example 1.
  • the canisters were stored without protective packaging at 25° C. and 60% RH and stored for duration of 12 months. Each lot was tested for delivered dose uniformity through can life and aerodynamic particle size distribution by Next Generation Impactor (NGI) in accordance to USP ⁇ 601>. Aerodynamic particle size distribution was determined by next generation impaction at 2 weeks, 1, 2, 3, 6 or 12 months.
  • NTI Next Generation Impactor
  • the fine particle fraction as a percentage of GP ex-actuator, at initial sampling was 50.2%. No significant change in the fine particle fraction was noted at any of the throughout 12 months of storage at 25° C. and 60% RH without aluminum foil overwrap, with FPF of 47.7% after 12 months.
  • FIG. 9 provides a view of the entire aerodynamic size distribution for each of the stability samples demonstrating desirable consistency on aerosol delivery. A summary of the fine particle fraction is shown in Table 7.
  • Glycopyrrolate MDI canisters containing 36 ⁇ g per actuation were prepared as described in Example 6, packaged in a heat sealed aluminum foil overwrap containing desiccant, and cycled for 6 weeks (6 hours at ⁇ 5° C. and 6 hours at 40° C.).
  • the delivered dose uniformity of glycopyrrolate through use was tested at the 0, 2, 4 and 6 weeks time points.
  • the mean glycopyrrolate delivered dose of each lot each time period was within ⁇ 15% of the mean, with one exception, as demonstrated in FIG. 10 .
  • the aerodynamic particle size distribution as measured by NGI remain unchanged after 168 temperature cycles as shown in FIG. 11 .
  • Glycopyrrolate MDI canisters containing 24 ⁇ g per actuation were prepared as described in Example 6 were stored for six weeks at 50° C. under ambient humidity. Another lot was stored for 8 weeks at 40° C. and 75% relative humidity. Yet another lot was stored for 12 weeks at 40° C. and 75% relative humidity.
  • the initial fine particle fraction (FPF) was 59.3%.
  • the FPF, 58.4%, of the canister stored for 6 weeks at 50° C. was unchanged compared to the initial.
  • the initial FPF of a lot stored at 40° C. remained unchanged after 8 and 12 weeks, FPF 56.8 and 57.6% respectively.
  • the aerodynamic particle size distributions as measured by the NGI are shown in FIG. 12 .
  • the MMAD remains relatively unchanged after 6 weeks at 50° C., 3.94 ⁇ m, and up to 12 weeks at 40° C., 3.84 ⁇ m, compared to the initial at 3.54 ⁇ m.
  • the FPF and the amounts of glycopyrrolate recovered from valve stem and actuator, and from the induction port (throat) and its mouth piece adaptor remained relatively unchanged over 3 months at elevated temperatures as shown in FIG. 12 .
  • Metered dose inhalers including pharmaceutical compositions of formoterol fumarate as described herein were prepared.
  • Formoterol fumarate ( ⁇ )-2-hydroxy-5-[(1RS)-1-hydroxy-2-[[(1RS)-2-(4-methoxyphenyl)-1-methylethyl]-amino]ethyl]formanilide fumarate, also known as ( ⁇ )-2′-hydroxy-5-[(RS)-1-hydroxy-2-[[RS)-p-methoxy- ⁇ -methylphenethyl]-amine]ethyl]formanilide fumarate, dihydrate was micronized to form active agent particles.
  • the particle size distribution of the micronized formoterol fumarate (FF) was determined by laser diffraction. 50% by volume of the micronized particles exhibited an optical diameter smaller than 1.6 ⁇ m, and 90% by volume exhibited an optical diameter smaller than 3.9 ⁇ m.
  • Suspending particles were manufactured as follows: 503 mL of a fluorocarbon-in-water emulsion of PFOB (perfluorooctyl bromide) stabilized by a phospholipid was prepared. 20.6 g of the phospholipid, DSPC (1,2-disteroyl-sn-glycero-3-phosphocholine), and 1.9 g of calcium chloride were homogenized in 403 mL of hot water (75° C.) using a high shear mixer. 100 mL of PFOB were added slowly during homogenization. The resulting coarse emulsion was then further homogenized using a high pressure homogenizer (Model C3, Avestin, Ottawa, CA) at pressures of up to 170 MPa for 5 passes.
  • PFOB perfluorooctyl bromide
  • the emulsion was spray dried in nitrogen using the following spray drying conditions: Inlet temperature 95° C., outlet temperature 71° C., emulsion feed rate 2.4 mL/min, total gas flow 498 L/min.
  • the particle size distribution of the suspending particles was determined by laser diffraction. 50% by volume of the suspending particles were smaller than 3 ⁇ m, the geometric standard deviation of the distribution was 1.9.
  • Metered dose inhalers were prepared by weighing the target masses of micronized active agent particles and suspending particles into coated glass vials with 15 mL volume. The target masses and the target delivered dose assuming 20% actuator deposition are given in Table 8 for three different configurations. For each configuration, additional glass bottles were filled with the respective amount of FF active agent particles without any suspending particles.
  • the canisters were crimp sealed with 63 ⁇ l valves (Valois, Les Vaudreuil, France) and filled with 11 g (9.1 mL at 25° C.) of HFA 134a (1,1,1,2-tetrafluoroethane) (Ineos Fluor, Lyndhurst, UK) by overpressure through the valve stem. After injecting the propellant, the canisters were sonicated for 15 seconds and agitated on a wrist action shaker for 30 minutes.
  • Formoterol fumarate MDI compositions were prepared according to the present invention. Micronized formoterol fumarate was commercially obtained and its particle size distribution measured as described in Example 1 was characterized by a d 10 , d 50 , d 90 or 0.6, 1.9 and 4.4 ⁇ m respectively and a Span of 2.0. Suspending particles used were prepared in a similar manner described in Example 1. MDI manufacturing was accomplished using a drug addition vessel (DVA) by first adding half of suspending particle quantity, next filling the microcrystalline FF, and lastly adding the remaining half of suspending particles to the top. Materials were added to the DAV in a humidity controlled environment of ⁇ 10% RH. The DAV was then connected to a 4 L suspension vessel.
  • DVA drug addition vessel
  • a slurry was then formed by adding a known amount of HFA-134a propellant (Ineos Fluor, Lyndhurst, UK) into the DAV, which is then removed from the suspension vessel and gently swirled. The slurry is then transferred back to the suspension mixing vessel and diluted with additional HFA-134a to form the final suspension at target concentration stirring gently with an impeller. The temperature inside the vessel was maintained at 21-23° C. throughout the entire batch production. After recirculation of the batch for 30 min, 14-mL fluorinated ethylene polymer (FEP) coated aluminum canisters (Presspart, Blackburn, UK) were filled with the suspension mixture through 50 ⁇ L EPDM valves (Bespak, King's Lynn, UK). Sample canisters were then selected at random for total canister assay to ensure correct formulation quantities.
  • HFA-134a propellant Ineos Fluor, Lyndhurst, UK
  • FEP fluorinated ethylene polymer
  • FIG. 14 shows the delivered dose uniformity for a co-suspension of FF at a 4.8 ⁇ g target dose per actuation.
  • the individual delivered dose per actuation for beginning, middle and end of actuations was within ⁇ 25% of the mean delivered dose, as demonstrated in FIG. 14 .
  • Formoterol Fumarate MDI compositions were prepared according to the present invention. Micronized formoterol fumarate was commercially obtained and its particle size distribution measured as described in Example 1 was characterized by a d 10 , d 50 , d 90 or 0.6, 1.9 and 4.4 ⁇ m respectively and a Span of 2.0. Suspending particles used were prepared in a similar manner described in Example 1. MDI manufacturing was accomplished as described in Example 11.
  • Aerosol performance was assessed in accordance with USP ⁇ 601>.
  • a Next Generation Impactor (NGI) operated at a flow rate of 30 L/min was used for determination of particle size distribution.
  • Sample canisters were seated into an actuator with two waste actuations and two additional waste priming actuations. Five actuations were collected in the NGI with a USP throat attached.
  • the valve, actuator, throat, NGI cups, stages, and filter were rinsed with volumetrically dispensed solvent.
  • the sample solutions were assayed using a drug specific chromatographic method.
  • the fine particle fraction was defined using the sum of stages 3 through filter.
  • the aerodynamic particle size distribution of a FF co-suspension formulation was evaluated after manufacture and after three months of storage at 25° C.
  • FF formoterol fumarate
  • the amount of impurity F, a characteristic degradation product of FF, and total impurities were determined by reverse phase HPLC assay as follows: each canister is chilled, cut open, and the can contents are transferred to a centrifuge tube; the contents were dissolved in organic solvent, followed by the addition of an aqueous solvent to precipitate excipient (DSPC) from the solution; the solution was centrifuged to produce a clear supernatant solution; and each sample solution was analyzed using a C18 column, 4.6 ⁇ 150 mm and 3.0 ⁇ m particle size. The column temperature was kept at 30° C. The injection volume was 20 ⁇ l, and flow rate was set at 1 mL/min and detected by determining the UV absorption at 214 nm.
  • DSPC aqueous solvent to precipitate excipient
  • Micronized formoterol fumarate dihydrate (FF) (Inke, S. A., Barcelona, Spain) used in the present example had with particle size distribution by laser diffraction of 50% by volume of the micronized particles exhibited an optical diameter smaller than 1.9 ⁇ m, 90% by volume exhibited an optical diameter smaller than 4.1 ⁇ m.
  • Four batches of suspending particles were manufactured by spray drying as described in Example 1. All four batches were spray-dried from aqueous solution; solution concentration and spray drying parameters are given in Table 12.
  • the particle size distribution of the suspending particles was determined by laser diffraction.
  • the volume median optical diameter (VMD) and geometric standard deviation (GSD) are given in Table 12.
  • Electron micrographs of the suspending particles showed a variety of morphologies, and are shown in FIG. 17 through FIG. 20 , with FIG. 17 providing a micrograph of trehalose suspending particles, FIG. 18 providing a micrograph of HP- ⁇ -cyclodextrin suspending particles, FIG. 19 providing a micrograph of Ficoll MP 70 suspending particles, and FIG. 20 providing a micrograph of inulin suspending particles.
  • Trehalose particles appear to be spherical, with a smooth surface.
  • HP- ⁇ -cyclodextrin particles show extensive wrinkling of the surface, suggesting a partially buckled exterior with a hollow core.
  • Ficoll MP 70 and Inulin particles display some surface rugosity but are generally spheroidal.
  • Metered dose inhalers were prepared by weighing 0.9 mg of the micronized FF active agent particles and 60 mg of suspending particles into coated glass vials with 15 mL volume. FF was combined with each type of the four suspending particle species of Table 12.
  • the canisters were crimp sealed with 50 ⁇ L valves (Valois DF31/50 RCU, Les Vaudreuil, France) and filled with 10 mL of HFA propellant 134a (Ineos Fluor, Lyndhurst, UK) by overpressure through the valve stem. After injecting the propellant, the canisters were sonicated for 30 seconds and agitated on a wrist action shaker for 30 minutes. Additional inhalers containing suspending particles only and active agent particles only were filled as a control for each configuration.
  • Crystalline FF has a greater density than propellant 134a at room temperature, as do all four species of suspending particles in the present example. Consequently both FF and suspending particles settled to the bottom of the inhalers at room temperature.
  • the inhalers were immersed in an ethanol bath at ⁇ 10° C. (resulting in increased propellant density) and allowed to equilibrate for a minimum of 30 minutes. At this temperature, the FF active agent particles are less dense than the propellant and consequently cream to the top of the propellant volume, while all four species of suspending agent particles remain settled at the bottom of the propellant volume.
  • FF active agent particles alone formed a cream layer atop the propellant volume, and trehalose, HP- ⁇ -cyclodextrin, inulin, and Ficoll PM70 particles alone all settled to the bottom of the glass vial.
  • FF active agent particles in combination with trehalose suspending particles formed a single sediment layer, with no particles creamed or afloat in the propellant, indicating that the FF particles interact with the trehalose suspending particles, and a co-suspension is formed.
  • some turbidity was present in the propellant, similar to that observed in the suspending particle only control vial.
  • Co-suspension compositions including glycopyrrolate (GP) and formoterol fumarate (FF) active agent particles were produced and MDIs incorporating the co-suspension compositions were prepared.
  • the co-suspension compositions produced included GP active agent particles, FF active agent particles or a combination of both GP and FF active agent particles.
  • the GP and FF material was supplied as micronized, crystalline material with particle size distribution as shown in Table 14.
  • Suspending particles were manufactured via spray dried emulsion at a feed stock concentration of 80 mg/mL with a composition of 93.44% DSPC (1,2-Distearoyl-sn-Glycero-3-Phosphocholine) and 6.56% anhydrous calcium chloride (equivalent to a 2:1 DSPC:CaCl 2 mole/mole ratio).
  • DSPC and CaCl 2 was dispersed with a high shear mixer at 8000-10000 rpm in a vessel containing heated water (80 ⁇ 3° C.) with PFOB slowly added during the process.
  • the emulsion was then processed with 6 passes in a high pressure homogenizer (10000-25000 psi).
  • the emulsion was then spray dried via a spray dryer fitted with a 0.42′′ atomizer nozzle with a set atomizer gas flow of 18 SCFM.
  • the drying gas flow rate was set to 72 SCFM with an inlet temperature of 135° C., outlet temperature 70° C., and an emulsion flow rate of 58 mL/min.
  • the co-suspensions were prepared by first dispensing the appropriate quantities of micronized GP and FF active agent particles and suspending particles into a drug addition vessel (DAV) inside a humidity controlled chamber (RH ⁇ 5%).
  • DAV drug addition vessel
  • RH ⁇ 5% humidity controlled chamber
  • the suspending particles were added in three equal portions intercalating the addition of GP and FF after the first and second addition respectively.
  • the DAV is then sealed under a nitrogen atmosphere and connected to the suspension vessel containing 12 kg of HFA-134a (Ineos Fluor, Lyndhurst, UK).
  • a slurry was then formed by adding 0.5-1 kg of HFA-134a into the DAV, which is then removed from the suspension vessel and gently swirled.
  • the slurry is then transferred back to the suspension mixing vessel and diluted with additional HFA-134a to form the final suspension at target concentration stirring gently with an impeller.
  • the suspension is then recirculated via a pump to the filling system for a minimum time prior to initiation of filling. Mixing and recirculation continue throughout the filling process.
  • 50 ⁇ L valves (Bespak, King's Lynn, UK) are placed onto 14-mL fluorinated ethylene polymer (FEP) coated aluminum canisters (Presspart, Blackburn, UK) canisters and then purged of air either by a vacuum crimping process, or an HFA-134a purging process followed by valve crimping.
  • the crimped canisters are then filled through-the-valve with the appropriate quantity of suspension, adjusted by the metering cylinder.
  • MDIs containing the dual co-suspensions described in this Example were prepared to contain two different doses GP and FF. Specifically, a first run of dual co-suspension compositions were prepared to provide 18 ⁇ g per actuation GP and 4.8 ⁇ g per actuation FF (“low dose”), and a second run of dual co-suspension compositions were prepared to provide 36 ⁇ g per actuation GP and 4.8 ⁇ g per actuation FF (“high dose”). In addition to the dual co-suspensions compositions, co-suspensions including a single species of active agent particle were prepared.
  • compositions included either GP active agent particles or FF active agent particles and were referred to as “mono” or “monotherapy” co-suspensions.
  • the monotherapy co-suspension compositions were prepared as described for the dual co-suspensions, except that they included only one species of active agent particles (either GP or FF).
  • the monotherapy co-suspensions were formulated and monotherapy MDIs prepared to provide the following targeted delivered doses: 18 ⁇ g per actuation of GP, and 0.5, 1.0, 3.6 or 4.8 ⁇ g per actuation of FF.
  • the compositions and MDIs providing 0.5 ⁇ g FF and 1 ⁇ g FF per actuation are referred to as “ultra low” dose and were manufactured in a similar manner at a 4 L scale.
  • the drug specific aerodynamic size distributions achieved with MDIs containing the co-suspension compositions prepared according to this Example were determined as described in Example 1.
  • the proportionality of the aerodynamic size distributions of GP obtained from the low and high dose dual co-suspensions as well as the equivalency between the dual and monotherapy co-suspensions is demonstrated in FIG. 21 .
  • the proportionality of the aerodynamic size distributions of FF obtained from the dual and monotherapy co-suspensions, including the ultralow, low, and high dose compositions is demonstrated in FIG. 22 .
  • the delivered dose uniformity of the ultra low dose FF monotherapy MDIs was also measured as described in Example 1.
  • the DDU for the FF MDI containing 0.5 ⁇ g per actuation and 1.0 ⁇ g per actuation are shown in FIG. 23 . Desirable dose delivery uniformity is achieved even at ultra low doses.
  • Micronized salmeterol xinafoate (4-hydroxy- ⁇ 1-[[[6-(4-phenylbutoxy)hexyl]amino]methyl]-1,3-benzenedimethanol, 1-hydroxy-2-naphthalenecarboxylate) was received by the manufacturer (Inke SA, Germany) and used as active agent particles.
  • Suspending particles were manufactured as follows: 150 mL of a fluorocarbon-in water emulsion of PFOB (perfluoroctyl bromide) stabilized by a phospholipid was prepared. 12.3 g of the phospholipid, DSPC (1,2-Distearoyl-sn-Glycero-3-Phosphocholine), and 1.2 g of calcium chloride were homogenized in 100 mL of hot water (70° C.) using a high shear mixer. 65 mL of PFOB were added slowly during homogenization. The resulting coarse emulsion was then further homogenized using a high pressure homogenizer (Model C3, Avestin, Ottawa, CA) at pressures of up to 140 MPa for 3 passes
  • the emulsion was spray dried in nitrogen using the following spray drying conditions: Inlet temperature 90° C., outlet temperature 69° C., emulsion feed rate 2.4 mL/min, total gas flow 498 l/min.
  • the particle size distribution of the suspending particles, VMD was determined by laser diffraction. 50% by volume of the suspending particles were smaller than 2.7 ⁇ m, the Geometric Standard Deviation of the distribution was 2.0. Additionally, the aerodynamic particle size distribution of the suspending particles was determined with a time-of-flight particle sizer. 50% by volume of the suspending particles had an aerodynamic particle diameter smaller than 1.6 ⁇ m. The large difference between aerodynamic particle diameter and optical particle diameter indicates that the suspending particles had a low particle density ⁇ 0.5 kg/L.
  • Metered dose inhalers were prepared by weighing 2 mg of SX active agent particles and 60 mg of suspending particles into fluorinated ethylene polymer (FEP) coated aluminum canisters (Presspart, Blackburn, UK) with 19 mL volume. The suspending particle to active particle ratio was 30. The target delivered dose assuming 20% actuator deposition was 10 ⁇ g.
  • the canisters were crimp sealed with 63 ⁇ l valves (# BK 357, Bespak, King's Lynn, UK) and filled with 10 mL of HFA 134a (1,1,1,2-tetrafluoroethane) by overpressure through the valve stem. After injecting the propellant, the canisters were sonicated for 15 seconds and agitated on a wrist action shaker for 30 minutes.
  • the canisters were fitted with polypropylene actuators with a 0.3 mm orifice (# BK 636, Bespak, King's Lynn, UK). Additional inhalers for visual observation of suspension quality were prepared using 15 mL glass vials including a comparator filled with micronized SX only. Aerosol performance was assessed as described in Example 1. The MMAD was 3.7 ⁇ m and the fine particle fraction was 48%. Because the SX crystals forming the active agent particles and the propellant were nearly density matched at 15° C.-20° C., the visual observation was conducted on glass vials that were heated up to 30° C.-35° C. in a water bath. Under these conditions the SX active agent particles formulated alone sedimented rapidly, but no SX crystals were visible at the bottom of the co-suspension vial.
  • Micronized salmeterol xinafoate active agent particles were co-suspended through association with suspending particles of low density that were formulated according to the disclosure provided herein.
  • the association between salmeterol crystals and the suspending particles was strong enough to overcome buoyancy forces as it was observed that settling of the crystals is inhibited.
  • Micronized fluticasone propionate (S-(fluoromethyl)6 ⁇ ,9-difluoro-11 ⁇ -17-dihydroxy-16 ⁇ -methyl-3-oxoandrosta-1,4-diene-17 ⁇ -carbothioate, 17-propionate) was received as micronized by the manufacturer (Hovione FarmaCiencia SA, Loures Portugal) and used as active agent particles.
  • the particle size distribution of the fluticasone propionate (FP) was determined by laser diffraction. 50% by volume of the micronized particles exhibited an optical diameter smaller than 2.6 ⁇ m, 90% by volume exhibited an optical diameter smaller than 6.6 ⁇ m.
  • the suspending particles were the same lot that was used in Example 16, and the manufacture and characteristics of the suspending particles are described there.
  • Metered dose inhalers were prepared as described in Example 16. Propellant type, fill weights, suspending particle to active particle ratio, and target ex actuator dose for six configurations are listed in Table 15. Additional inhalers for visual observation of suspension quality were prepared using 15 mL glass vials. Two comparator glass vials were filled with micronized FP only in either HFA 134a or HFA 227ea.
  • Aerosol performance was assessed as described in Example 1. The results are shown in Table 15. These co-suspensions were made with micronized FP that had a relatively coarse particle size distribution. The MMAD is comparatively large and trends upward with increasing FP concentration, but is still in a range usable for respiratory drug delivery. No significant differences were observed between propellant types.
  • SX salmeterol xinafoate
  • FP fluticasone propionate
  • the fluticasone propionate and salmeterol xinafoate used were as described in Examples 16 and 17, respectively.
  • the suspending particles were the same lot that was used in Example 16, and the manufacture and characteristics of the suspending particles are described there.
  • Metered dose inhalers were prepared by weighing the target masses of micronized fluticasone propionate and salmeterol xinafoate and suspending particles into fluorinated ethylene polymer (FEP) coated aluminum canisters (Presspart, Blackburn, UK) with 19 mL volume.
  • FEP fluorinated ethylene polymer
  • the canisters were crimp sealed with 63 ⁇ l valves (# BK 357, Bespak, King's Lynn, UK) and filled with 10 mL of HFA 134a (1,1,1,2-tetrafluoroethane) (Ineos Fluor, Lyndhurst, UK) by overpressure through the valve stem.
  • the canisters were sonicated for 15 seconds and agitated on a wrist action shaker for 30 minutes.
  • the canisters were fitted with polypropylene actuators with a 0.3 mm orifice (# BK 636, Bespak, King's Lynn, UK). Aerosol performance was assessed shortly after manufacturing in accordance with USP 601 as previously described in Example 1. Results are reported below in Table 16.
  • the MMADs of fluticasone propionate active agent particles and salmeterol xinafoate active agent particles were acceptable and similar to the aerosol performance of the respective monotherapy co-suspensions, described in Examples 16 and 17, respectively.
  • the delivered dose uniformity through use was tested and all individual delivered doses were within ⁇ 20% of mean, at 6.1% relative standard deviation.
  • SX salmeterol xinafoate
  • FP fluticasone propionate
  • the fluticasone propionate and salmeterol xinafoate used to form the active agent particles and suspending particles referenced in this example were as described in Examples 16 and 17, respectively.
  • Fluticasone propionate containing suspending particles were manufactured as follows: 200 mL of a fluorocarbon-in-water emulsion of PFOB stabilized by a phospholipid was prepared. 3.3 g of the phospholipid (DSPC) and 0.8 g of micronized fluticasone propionate were dispersed and 0.3 g of calcium chloride dihydrate was dissolved in 100 mL of warm water (70° C.) using a high shear mixer. 44 mL of PFOB was added slowly during dispersion. This resulting coarse emulsion was then further homogenized using a high pressure homogenizer at 140 MPa for 3 passes. The homogenization reduced the particle size of the suspended FP crystals. The emulsion was spray dried in nitrogen using the following spray drying conditions: inlet temperature 95° C.; outlet temperature 72° C.; emulsion feed rate 2.4 mL/min; and total gas flow 525 L/min.
  • Metered dose inhalers were prepared by weighing the target masses of micronized salmeterol xinafoate active agent particles and fluticasone propionate containing suspending particles into fluorinated ethylene polymer (FEP) coated aluminum canisters (Presspart, Blackburn, UK) with 19 mL volume.
  • FEP fluorinated ethylene polymer
  • the canisters were crimp sealed with 63 ⁇ l valves (# BK 357, Bespak, King's Lynn, UK) and filled with 10 mL of HFA 134a (1,1,1,2-tetrafluoroethane) (Ineos Fluor, Lyndhurst, UK) by overpressure through the valve stem.
  • the canisters were sonicated for 15 seconds and agitated on a wrist action shaker for 30 minutes.
  • the canisters were fitted with polypropylene actuators with a 0.3 mm orifice (# BK 636, Bespak, King's Lynn, UK). Aerosol performance was assessed shortly after manufacturing in accordance with USP ⁇ 601> as previously described in Example 1. Results are reported below in Table 17.
  • the delivered dose uniformity through use was tested and all individual delivered doses were within ⁇ 25% of mean, at 9.0% RSD for FP and 13% RSD for SX.
  • Visual observation of the co-suspension was conducted in glass vials and no sedimentation of active agent particles was observed. The vials were left to settle for 24 hours without agitation. The suspension flocculated slowly and formed a homogeneous, single cream layer, showing no indication of separation of SX and suspending particles.
  • Budesonide 16,17-(butylidenebis(oxy))-11,21-dihydroxy-, (11- ⁇ ,16- ⁇ )-pregna-1,4-diene-3,20-dione, was received micronized by the manufacturer (AARTI, Mumbai, India) and used as active agent particles.
  • the particle size distribution of the budesonide was determined by laser diffraction. 50% by volume of the micronized particles exhibited an optical diameter smaller than 1.9 ⁇ m, 90% by volume exhibited an optical diameter smaller than 4.3 ⁇ m.
  • Mometasone furoate 9 ⁇ ,21-Dichloro-11 ⁇ ,17-dihydroxy-16 ⁇ -methylpregna-1,4-diene-3,20-dione 17-(2-furoate) was received micronized by the manufacturer (AARTI, Mumbai, India) and used as active agent particles.
  • the particle size distribution of the budesonide was determined by laser diffraction. 50% by volume of the micronized particles exhibited an optical diameter smaller than 1.6 ⁇ m, 90% by volume exhibited an optical diameter smaller than 3.5 ⁇ m.
  • Suspending particles were manufactured as described in Example 1.
  • the emulsion was spray dried in nitrogen using the following spray drying conditions: Inlet temperature 95° C., outlet temperature 72° C., emulsion feed rate 2.4 mL/min, total gas flow 498 L/min.
  • Metered dose inhalers were prepared by weighing the target masses of micronized active and suspending particles into coated glass vials with 15 mL volume.
  • the canisters were crimp sealed with 63 ⁇ l valves (Valois, Les Vaudreuil, France) and filled with 9.2 g of HFA 134a (1,1,1,2-tetrafluoroethane) (Ineos Fluor, Lyndhurst, UK) by overpressure through the valve stem. After injecting the propellant, the canisters were sonicated for 15 seconds and agitated on a wrist action shaker for 30 minutes.
  • the canisters were fitted with polypropylene actuators with a 0.3 mm orifice (# BK 636, Bespak, King's Lynn, UK).
  • Aerosol performance was assessed shortly after manufacturing in accordance with USP ⁇ 601> as previously described in Example 1.
  • the suspension concentrations were 0.8 mg/mL for budesonide active agent particles, 1.1 mg/mL for mometasone furoate active agent particles, and 6 mg/mL for the suspending particles.
  • the suspending particle to active agent particle ratio was 7.5 for budesonide and 5.5 for mometasone furoate.
  • Target ex actuator doses were 40 ⁇ g for budesonide and 55 ⁇ g for mometasone furoate.
  • compositions as described herein were prepared and evaluated.
  • the composition included a combination of glycopyrrolate (GP) and formoterol fumarate (FF) active agents.
  • GP glycopyrrolate
  • FF formoterol fumarate
  • GP was present in the propellant as micronized, crystalline active agent particles. It was co-suspended with spray dried suspending particles that included FF disposed within the material forming the suspending particle. To achieve this, FF was dissolved in the feedstock used to manufacture the lipid-based suspending particles.
  • GP active agent particles were formed by micronizing glycopyrrolate using a jet mill.
  • the particle size distribution of the glycopyrrolate active agent particles was determined by laser diffraction. 50% by volume of the active agent particles exhibited an optical diameter smaller than 1.7 ⁇ m, and 90% by volume exhibited an optical diameter smaller than 3.5 ⁇ m.
  • FF-containing suspending particles were manufactured as follows: 654 mL of a fluorocarbon-in-water emulsion of PFOB (perfluorooctyl bromide) stabilized by a phospholipid was prepared; 26.5 g of the phospholipid, DSPC (1,2-disteroyl-sn-glycero-3-phosphocholine), and 2.4 g of calcium chloride were homogenized in 276 mL of hot water (80° C.) using a high shear mixer; and 142 mL of PFOB were added slowly during homogenization.
  • PFOB perfluorooctyl bromide
  • the resulting coarse emulsion was then further homogenized using a high pressure homogenizer (Model C3, Avestin, Ottawa, CA) at pressures of up to 170 MPa for 5 passes.
  • 552 mg FF was dissolved in 273 mL of warm water (50° C.) and most of the solution was combined with the emulsion using a high shear mixer.
  • the emulsion was spray dried in nitrogen using the following spray drying conditions: inlet temperature 95° C.; outlet temperature 68° C.; emulsion feed rate 2.4 mL/min; and total gas flow 498 l/min.
  • the final mass fraction of formoterol in the spray dried powder was 2%.
  • a second lot of FF-containing suspending particles was manufactured in a similar fashion.
  • the mass fraction of FF in the spray dried powder was 1% for this lot.
  • a third lot of suspending particles was manufactured without FF.
  • the particle size distribution of the suspending particles was determined by laser diffraction. For both lots of FF containing suspending particles, 50% by volume were smaller than 3.5 ⁇ m and the Geometric Standard Deviation of the distribution was 1.7. For the suspending particles without FF, 50% by volume were smaller than 3.2 ⁇ m and the Geometric Standard Deviation of the distribution was 1.8.
  • MDIs were prepared by weighing the target masses of active agent particles and suspending particles into fluorinated ethylene polymer (FEP) coated aluminum canisters (Presspart, Blackburn, UK) with a 19 mL volume.
  • FEP fluorinated ethylene polymer
  • the canisters were crimp sealed with 63 ⁇ l valves (# BK 357, Bespak, King's Lynn, UK) and filled with 12.4 g of HFA 134a (1,1,1,2-tetrafluoroethane) (Ineos Fluor, Lyndhurst, UK) by overpressure through the valve stem.
  • HFA 134a 1,1,1,2-tetrafluoroethane
  • the canisters were sonicated for 15 seconds and agitated on a wrist action shaker for 30 minutes.
  • the canisters were fitted with polypropylene actuators with a 0.3 mm orifice (# BK 636, Bespak, King's Lynn, UK).
  • the filled MDIs were stored valve down at two different conditions: refrigerated at 5° C. without overwrap and controlled room temperature at 25° 0160% RH with a foil overwrap. Aerosol performance and delivered dose uniformity tests were carried out at different time points. Aerosol performance was assessed shortly after manufacturing in accordance with USP ⁇ 601>.
  • Sample canisters were seated into an actuator with two waste actuations and two additional waste priming actuations. Five actuations were collected in the NGI with a USP throat attached. The valve, actuator, throat, NGI cups, stages, and filter were rinsed with volumetrically dispensed solvent.
  • the sample solutions were assayed using a drug-specific chromatographic method.
  • the fine particle fraction was defined using the sum of stages 3 through filter.
  • Delivered dose uniformity through use testing was performed using a Dose Uniformity Sampling Apparatus as described by USP ⁇ 601>. Inhalers were seated and primed as described before. Two actuations were collected and assayed at beginning, middle and end of use.
  • FIGS. 24 and 26 show the ex-actuator dose for configuration 1A and 1B, respectively, normalized by the actual metered doses of the canister. Assuming an actuator deposition of 20% the target ex-actuator doses for both actives were 80%.
  • the individual FF and GP doses are represented by dots and triangles, respectively.
  • the closed line denotes the mean of the formoterol doses, and the broken line denotes the mean of the glycopyrrolate doses.
  • FIGS. 25 and 27 show the ratio of the normalized ex actuator doses for configuration 1A and 1B, respectively. The result indicates that the dose ratio remained constant through canister life. Furthermore the variability of the dose ratio is much lower than that of the individual doses, indicating that a co-suspension with a consistent carrier to active ratio was formed and maintained through container life.
  • MDIs containing FF and GP were prepared to provided target delivered doses of 2.4 and 18 ⁇ g per actuation FF and GP, respectively.
  • GP active agent was micronized and had a d 10 , d 50 , d 90 and span of 0.6, 1.7, 3.6 and 1.9 ⁇ m respectively as measured by laser diffraction as described Example 21.
  • FF was incorporated into spray dried suspending particles and prepared as described in Example 21, with a composition of 2% FF, 91.5% DSPC and 6.5% CaCL 2 .
  • the GP, FF and GP+FF MDIs were prepared by weighing the target masses of active agent particles and suspending particles into fluorinated ethylene polymer (FEP) coated aluminum canisters (Presspart, Blackburn, UK) with a 19 mL volume.
  • FEP fluorinated ethylene polymer
  • the canisters were crimp sealed with 50 ⁇ l valves (# BK 357, Bespak, King's Lynn, UK) and filled with 10.2 g of HFA 134a (1,1,1,2-tetrafluoroethane) (Ineos Fluor, Lyndhurst, UK) by overpressure through the valve stem.
  • HFA 134a 1,1,1,2-tetrafluoroethane
  • the canisters were sonicated for 15 seconds and agitated on a wrist action shaker for 30 minutes.
  • the canisters were fitted with polypropylene actuators with a 0.3 mm orifice (# BK 636, Bespak, King's Lynn,
  • the aerosol performance of the combination co-suspension composition including both GP and FF active agent was no different than the aerosol performance achieved by a suspension composition including FF alone or a co-suspension composition containing GP alone, demonstrating that the aerosol properties of the individual active agents are substantially the same when achieved from the single component or dual combination co-suspensions.
  • An exemplary dual co-suspension composition according to the present description was produced and metered dose inhalers incorporating the composition were prepared.
  • the composition included a combination of glycopyrrolate (GP) and formoterol fumarate (FF), with each being provided as a micronized, crystalline material.
  • a combination crystalline co-suspension MDI was manufactured by semi-automated suspension filling.
  • the dual co-suspension consisted of a combination of two microcrystalline active pharmaceutical ingredients (also referred to as “APIs” or “API” in the singular), GP and FF, co-suspended with suspending particles in HFA 134a propellant.
  • the dual co-suspension was formulated to provide a delivered dose of 18 ⁇ g GP per actuation and 4.8 ⁇ g FF per actuation.
  • the FF API material used was denoted as “coarse”, while in other compositions, the FF API material used was denoted as “fine.”
  • the co-suspension compositions incorporated coarse or fine FF, the compositions were formulated to provide a delivered FF dose of 4.8 ⁇ g per actuation.
  • the particle size characteristics for the coarse FF, fine FF and GP API materials used in formulation the co-suspension compositions described in this Example are detailed in Table 19.
  • a monotherapy co-suspension composition incorporating only FF active agent material was formulated.
  • the FF monotherapy co-suspension utilized coarse FF API.
  • a monotherapy MDI was manufactured using such FF monotherapy co-suspension, and the FF monotherapy MDI was formulated and manufactured provide a delivered dose of 4.8 ⁇ g FF per actuation.
  • Suspending particles were manufactured via spray dried emulsion at a feed stock concentration of 80 mg/mL with a composition of 93.44% DSPC (1,2-Distearoyl-sn-Glycero-3-Phosphocholine) and 6.56% anhydrous calcium chloride (equivalent to a 2:1 DSPC:CaCl 2 mole/mole ratio).
  • DSPC and CaCl 2 was dispersed with a high shear mixer at 8000-10000 rpm in a vessel containing heated water (80 ⁇ 3° C.) with PFOB slowly added during the process.
  • the emulsion was then processed with 6 passes in a high pressure homogenizer (10000-25000 psi).
  • the emulsion was then spray dried via a spray dryer fitted with a 0.42′′ atomizer nozzle with a set atomizer gas flow of 18 SCFM.
  • the drying gas flow rate was set to 72 SCFM with an inlet temperature of 135° C., outlet temperature 70° C., and an emulsion flow rate of 58 mL/min.
  • a drug addition vessel (DAV) was prepared for suspension filling in the following manner: first adding half of suspending particle quantity, next filling microcrystalline materials, and lastly adding the remaining half of suspending particles to the top. Materials were added to the vessel in a humidity controlled environment of ⁇ 10% RH. The DAV was then connected to a 4 L suspension vessel and flushed with HFA 134a propellant and then mixed with gently to form a slurry. The slurry is then transferred back to the suspension mixing vessel and diluted with additional HFA-134a to form the final suspension at target concentration stirring gently with an impeller. The temperature inside the vessel was maintained at 21-23° C. throughout the entire batch production.
  • the aerosol performance of the dual co-suspension compositions prepared according to this Example was evaluated and compared to the co-suspension composition prepared according to Example 21, with aerosol performance being determined in accordance with USP ⁇ 601> as described Example 1. The results of such comparisons are provided in FIG. 32 through FIG. 34 .
  • the FF and GP particle size distributions for the dual co-suspension compositions were substantially the same as those achieved by the co-suspension composition prepared according to Example 21 where FF is incorporated into the suspending particles via spray drying.
  • the delivered dose uniformity for GP and FF provided by the dual co-suspension compositions as described in this Example was assessed determined in accordance with USP ⁇ 601> as described Example 1. The results of this assessment are illustrated in FIG. 35 .
  • the dual co-suspension formulations provided desirable DDU characteristics for both GP and FF as all actuations delivered the expected dose within ⁇ 25% of the mean.
  • Dual co-suspension compositions were prepared with suspending particles including either mometasone furoate (MF) or budesonide (BD), and MDIs incorporating the composition were prepared.
  • the triple co-suspension composition included a combination of crystalline glycopyrrolate (GP) and formoterol fumarate (FF) active agent particles co-suspended with suspending particles including either MF or BD.
  • GP crystalline glycopyrrolate
  • FF formoterol fumarate
  • Each of the APIs were provided as a micronized, crystalline material.
  • Suspending particles containing 50% (w/w) of either BD or MF were manufactured as follows: high shear homogenization of a dispersion containing 2.8 g of DSPC (1,2-Distearoyl-sn-Glycero-3-Phosphocholine), and 0.26 g of calcium chloride in 400 mL of hot water (75° C.) using a high shear mixer was performed while 56.6 g of PFOB were added slowly. Micronized MF or BD (in 1:1 weight proportion to DSPC) was added to the resulting coarse emulsion, which was further homogenized using a high pressure homogenizer (Model C3, Avestin, Ottawa, CA) at pressures of up to 170 MPa for 3 to 5 passes.
  • a high pressure homogenizer Model C3, Avestin, Ottawa, CA
  • the emulsion was spray dried using the following spray drying conditions: inlet temperature 90-95° C.; outlet temperature 95-72° C.; emulsion feed rate 2-8 mL/min; total dry nitrogen flow 525-850 L/min.
  • the particle size distribution of the resulting powders was determined by laser diffraction, 50% by volume of the suspending particles were smaller than 1.8 ⁇ m, the span of the distribution was 1.6 ⁇ m.
  • MDI canisters containing either 50% (w/w) MF or BD containing suspending particles were prepared, targeting a 50 or 100 ⁇ g per actuation of MF or BD, respectively.
  • Metered dose inhalers were prepared by weighing the target masses of active agent containing suspending particles and in some cases additional suspending particles, to reach a total suspension concentration of 5.5 mg/mL, into fluorinated ethylene polymer (FEP) coated aluminum canisters (Presspart, Blackburn, UK) with 14 mL volume.
  • FEP fluorinated ethylene polymer
  • the canisters were crimp sealed with 50 ⁇ l valves (Bespak, King's Lynn, UK) and filled with 10 mL of HFA 134a (1,1,1,2-tetrafluoroethane) (Ineos Fluor, Lyndhurst, UK) by overpressure through the valve stem. After injecting the propellant, the canisters were sonicated for 15 seconds and agitated on a wrist action shaker for 30 minutes. The canisters were fitted with polypropylene actuators with a 0.3 mm orifice (Bespak, King's Lynn, UK).
  • the aerosol particle size distributions of the above MDIs were determined in accordance with USP ⁇ 601> as described in Example 1, and results are shown in Table 21.
  • a comparable series of canisters containing MF or BD containing suspending particles in combination with GP and FF active agent particles were produced.
  • Sufficient micronized GP and FF API material was added to such canisters in amounts sufficient to provide targeted delivered doses of 36 ⁇ g per actuation and 6 ⁇ g per actuation for GP and FF, respectively.
  • additional suspending particles prepared as described in Example 1 were added to reach a total suspension concentration of 5.5 mg/mL.
  • the aerosol particle size distributions of the above triple co-suspension MDIs were determined in accordance with USP ⁇ 601> as described in Example 1, with the results are shown in Table 22. Comparison of results in Table 21 and Table 22 demonstrate that the mass mean aerodynamic diameter of the corticosteroid in the single component suspensions is equivalent to the one obtained in the corresponding triple combination compositions. As was true of the co-suspension compositions containing a combination of two different active agents, the triple co-suspension compositions prepared according to the present description avoided a combination effect. In addition the fine particle fractions of the microcrystalline active agents are mostly independent of the type of the corticosteroid in monotherapy or triple combination compositions, even though the doses per actuation of MF or BD are substantially different.
  • Metered dose inhalers containing a triple co-suspension composition were prepared according to the present description.
  • the composition included a combination of glycopyrrolate (GP), formoterol fumarate (FF), and mometasone furoate (MF) active agent particles, with each being provided as a micronized, crystalline API material.
  • GP glycopyrrolate
  • FF formoterol fumarate
  • MF mometasone furoate
  • a triple co-suspension MDI was manufactured by semi-automated suspension filling.
  • the triple co-suspension consisted of a combination of three microcrystalline active pharmaceutical ingredients forming three different species of active agent particles: MF (corticosteroid); GP (LAMA); and FF (LABA). These three different species of active agent particles were co-suspended with suspending particles in HFA 134a propellant.
  • the triple co-suspension was formulated to the following delivered dose targets: 50 ⁇ g per actuation MF; 36 ⁇ g per actuation GP; and 4.8 ⁇ g per actuation FF.
  • a monotherapy co-suspension including only MF was produced.
  • the monotherapy MF co-suspension included MF active agent particles co-suspended in the propellant with suspending particles as described in this Example, and was formulated to provide a target delivered dose of 50 ⁇ g per actuation MF.
  • Suspending particles were manufactured via spray dried emulsion at a feed stock concentration of 80 mg/mL with a composition of 93.44% DSPC (1,2-Distearoyl-sn-Glycero-3-Phosphocholine) and 6.56% anhydrous calcium chloride (equivalent to a 2:1 DSPC:CaCl 2 mole/mole ratio).
  • DSPC and CaCl 2 were dispersed with a high shear mixer at 8000-10000 rpm in a vessel containing heated water (80 ⁇ 3° C.) with PFOB slowly added during the process.
  • the emulsion was then processed with 5 passes in a high pressure homogenizer (10000-25000 psi).
  • the emulsion was then spray dried via a spray dryer fitted with a 0.42′′ atomizer nozzle with a set atomizer gas flow of 18 SCFM.
  • the drying gas flow rate was set to 72 SCFM with an inlet temperature of 135° C., outlet temperature 70° C., and an emulsion flow rate of 58 mL/min.
  • a drug addition vessel (DAV) was used for suspension filling in the following manner: first adding half of suspending particle quantity, next filling microcrystalline materials, and lastly adding the remaining half of suspending particles to the top. Materials were added to the vessel in a humidity controlled environment of ⁇ 10% RH. The DAV was then connected to a 4 L suspension vessel and flushed with HFA 134a propellant and then mixed with a magnetic stir bar. The temperature inside the vessel was maintained at 21-23° C. throughout the entire batch production. After recirculation of the batch for 30 min canisters were filled with the suspension mixture through 50 ⁇ L EPDM valves. Sample canisters were the selected at random for Total Canister Analysis to ensure correct formulation quantities.
  • DAV drug addition vessel
  • the freshly manufactured triple co-suspension MDI batch was then placed on one week quarantine before initial product performance analysis.
  • the mometasone furoate only MDI was manufactured by suspension filling in the same manner.
  • Fluorinated ethylene polymer (FEP) coated aluminum canisters Presspart, Blackburn, UK) with 14 mL volume.
  • the canisters were crimp sealed with 50 ⁇ l valves (Bespak, King's Lynn, UK) and filled with 10 mL of HFA 134a (1,1,1,2-tetrafluoroethane) (Ineos Fluor, Lyndhurst, UK) by overpressure through the valve stem.
  • the canisters were fitted with polypropylene actuators with a 0.3 mm orifice (Bespak, King's Lynn, UK).
  • the primary particle size distribution of all microcrystalline APIs was determined by laser diffraction as described in Example 1, results are shown in Table 23. Aerodynamic particle size distribution and mass mean aerodynamic diameter of all components upon actuation of the suspension MDIs was determined by drug specific cascade impaction in accordance with USP ⁇ 601> as described in Example 1 and are shown in Table 24.
  • FIG. 36 illustrates the DDU of GP, FF and MF achieved from two canisters containing MF only and two canisters containing MF, GP and FF prepared according to this Example.
  • the DDU of MF delivered from the MF monotherapy configuration is equivalent to the one achieved with the triple co-suspension composition.
  • the aerosol particle size distributions achieved for FF and GP from the triple co-suspension composition of this Example was compared to the one achieved from a co-suspension containing two active agents, FF and GP prepared according Example 15.
  • the aerodynamic particle size distribution of FF and GP are equivalent whether delivered from the compositions containing two active agents or three active agents as shown in FIGS. 37 and 38 , respectively, thus the triple co-suspension compositions prepared according to the present description avoided a combination effect.
  • triple co-suspension compositions were produced and metered dose inhalers incorporated in the composition were prepared.
  • the triple co-suspensions included glycopyrrolate (GP) or tiotropium bromide (TB) in combination with formoterol fumarate (FF), and mometasone furoate (MF) active agents, with each API being used as micronized, crystalline material.
  • GP glycopyrrolate
  • TB tiotropium bromide
  • FF formoterol fumarate
  • MF mometasone furoate
  • APIs active pharmaceutical ingredients
  • corticosteroid a corticosteroid
  • LAMA a LAMA
  • LABA a LABA
  • the APIs were provided as microcrystalline materials that served as the active agent particles co-suspended with suspending particles prepared as described herein.
  • the triple co-suspension compositions prepared as described in this Example were prepared by adding the active agent particles and suspending particles to an HFA 134a propellant.
  • the triple co-suspension containing glycopyrrolate (Triple GFM) was formulated to deliver 40 ⁇ g per actuation MF; 13 ⁇ g per actuation GP; and 4.8 ⁇ g per actuation FF.
  • the active agent particles were co-suspended with suspending particles manufactured using an emulsion composed of 93.46% DSPC (1,2-Distearoyl-sn-Glycero-3-Phosphocholine) and 6.54% anhydrous calcium chloride spray dried with an 80 mg/mL feed concentration.
  • the DSPC:CaCl 2 molar ratio of the suspending particles was 2:1.
  • the suspending particles were combined with the active agent particles in propellant for a formulation target suspending particle concentration of 6 mg/mL.
  • the primary particle sizes of the microcrystalline active agent particles determined by Sympatec laser diffraction measurements as described in Example 1, are displayed below in Table 25.
  • the triple co-suspension containing tiotropium bromide (Triple TFM) was prepared using anhydrous tiotropium bromide (TB).
  • the TFM triple co-suspension was formulated to deliver 50 ⁇ g per actuation MF; 9 ⁇ g per actuation TB; and 4.8 ⁇ g per actuation FF.
  • the suspending particles were prepared as described in relation to the Triple GFM co-suspension, and the active agent particles were co-suspended with the suspending particles at a targeted suspending particle concentration of 6 mg/mL.
  • the primary particle sizes of the microcrystalline active agent particles determined by Sympatec laser diffraction measurements as described in Example 1, are displayed below in Table 26.
  • the aerosol particle size distribution, fine particle fraction, and mass median aerodynamic diameter were determined for the triple co-suspension compositions described in this Example in accordance with USP ⁇ 601> as described in Example 1.
  • Table 27 sets out the MMAD and FPF performance for Triple GFM and Triple TFM, while the desirable aerosol properties achieved by the Triple GFM and Triple TFM co-suspensions are shown in FIG. 39 (showing the aerodynamic particle size distribution of GP and TB obtained from Triple GFM and Triple TFM, respectively).
  • the fine particle fractions of the individual microcrystalline active agents, achieved in the triple formulations are remarkably similar in spite of differences in the size of the active agent particles, demonstrating the benefits of the compositions described in the present invention.

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