US20090241949A1 - Dry powder inhalation system - Google Patents

Dry powder inhalation system Download PDF

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Publication number
US20090241949A1
US20090241949A1 US12/413,405 US41340509A US2009241949A1 US 20090241949 A1 US20090241949 A1 US 20090241949A1 US 41340509 A US41340509 A US 41340509A US 2009241949 A1 US2009241949 A1 US 2009241949A1
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US
United States
Prior art keywords
mouthpiece
dry powder
cartridge
housing
powder inhaler
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US12/413,405
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English (en)
Inventor
Chad C. Smutney
P. Spencer Kinsey
John M. Polidoro
Carl R. Sahi
Benoit Adamo
Scott McLean
Dennis Overfield
Anthony Bryant
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Mannkind Corp
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Individual
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Priority to US12/413,405 priority Critical patent/US20090241949A1/en
Assigned to MANNKIND CORPORATION reassignment MANNKIND CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MCLEAN, SCOTT, OVERFIELD, DENNIS O., POLIDORO, JOHN M., SAHI, CARL R., SMUTNEY, CHAD C., ADAMO, BENOIT, BRYANT, ANTHONY J., KINSEY, P. SPENCER
Publication of US20090241949A1 publication Critical patent/US20090241949A1/en
Assigned to DEERFIELD PRIVATE DESIGN FUND II, L.P., DEERFIELD PRIVATE DESIGN INTERNATIONAL II, L.P., HORIZON SANTE FLML SARL reassignment DEERFIELD PRIVATE DESIGN FUND II, L.P. SECURITY AGREEMENT Assignors: MANNKIND CORPORATION
Assigned to AVENTISUB LLC reassignment AVENTISUB LLC PATENT SECURITY AGREEMENT Assignors: MANNKIND CORPORATION
Priority to US14/863,136 priority patent/US20160008557A1/en
Assigned to MANNKIND CORPORATION reassignment MANNKIND CORPORATION RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: AVENTISUB LLC
Priority to US16/718,732 priority patent/US20200121869A1/en
Priority to US18/099,829 priority patent/US20230149641A1/en
Abandoned legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M15/00—Inhalators
    • A61M15/0001—Details of inhalators; Constructional features thereof
    • A61M15/0021—Mouthpieces therefor
    • A61M15/0023—Mouthpieces therefor retractable
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M15/00—Inhalators
    • A61M15/0001—Details of inhalators; Constructional features thereof
    • A61M15/0013—Details of inhalators; Constructional features thereof with inhalation check valves
    • A61M15/0015—Details of inhalators; Constructional features thereof with inhalation check valves located upstream of the dispenser, i.e. not traversed by the product
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M15/00—Inhalators
    • A61M15/0001—Details of inhalators; Constructional features thereof
    • A61M15/002—Details of inhalators; Constructional features thereof with air flow regulating means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M15/00—Inhalators
    • A61M15/0028—Inhalators using prepacked dosages, one for each application, e.g. capsules to be perforated or broken-up
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M15/00—Inhalators
    • A61M15/0028—Inhalators using prepacked dosages, one for each application, e.g. capsules to be perforated or broken-up
    • A61M15/003—Inhalators using prepacked dosages, one for each application, e.g. capsules to be perforated or broken-up using capsules, e.g. to be perforated or broken-up
    • A61M15/0043—Non-destructive separation of the package, e.g. peeling
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A61M2016/0015—Accessories therefor, e.g. sensors, vibrators, negative pressure inhalation detectors
    • A61M2016/0018—Accessories therefor, e.g. sensors, vibrators, negative pressure inhalation detectors electrical
    • A61M2016/0021—Accessories therefor, e.g. sensors, vibrators, negative pressure inhalation detectors electrical with a proportional output signal, e.g. from a thermistor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A61M2016/0027—Accessories therefor, e.g. sensors, vibrators, negative pressure pressure meter
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2202/00—Special media to be introduced, removed or treated
    • A61M2202/06—Solids
    • A61M2202/064—Powder
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2202/00—Special media to be introduced, removed or treated
    • A61M2202/07—Proteins
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/58—Means for facilitating use, e.g. by people with impaired vision
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/58—Means for facilitating use, e.g. by people with impaired vision
    • A61M2205/581—Means for facilitating use, e.g. by people with impaired vision by audible feedback
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/58—Means for facilitating use, e.g. by people with impaired vision
    • A61M2205/582—Means for facilitating use, e.g. by people with impaired vision by tactile feedback

Definitions

  • a pulmonary drug delivery system includes a dry powder inhaler; and a unit dose cartridge for using with the inhaler.
  • the cartridge can contain a drug delivery formulation for pulmonary delivery, for example, a formulation comprising a diketopiperazine and an active ingredient including peptides and proteins such as insulin and glucagon-like peptide 1.
  • the dry powder inhaler is compact and comprises a housing, and a mouthpiece having a chamber to install the unit dose cartridge containing medicament and can be separated from its housing for ease of cleaning.
  • Drug delivery systems for the treatment of disease which introduce active ingredients into the circulation are numerous and include oral, transdermal, inhalation, subcutaneous and intravenous administration.
  • Drugs delivered by inhalation are typically delivered using positive pressure relative to atmospheric pressure in air with propellants.
  • Such drug delivery systems deliver drugs as aerosols, nebulized or vaporized.
  • drug delivery to lung tissue has been achieved with dry powder inhalers. Dry powder inhalers can be breath-activated to deliver drugs by converting drug particles in a carrier into a fine dry powder which is entrained into an airflow and inhaled by the patient.
  • Drugs delivered with the use of a dry powder inhaler can no longer be intended to treat pulmonary disease only, but also specific drugs can be used to treat many conditions, including diabetes and obesity.
  • Dry powder inhalers used to deliver medicaments to the lungs, contain a dose system of a powder formulation usually either in bulk supply or quantified into individual doses stored in unit dose compartments, like hard gelatin capsules or blister packs.
  • Bulk containers are equipped with a measuring system operated by the patient in order to isolate a single dose from the powder immediately before inhalation. Dosing reproducibility requires that the drug formulation is uniform and that the dose can be delivered to the patient with consistent and reproducible results. Therefore, the dosing system must operate to completely discharge all of the formulation effectively during an inspiratory maneuver when the patient is taking his/her dose.
  • Flow properties of the powder formulation, and long term physical and mechanical stability in this respect are more critical for bulk containers than they are for single unit dose compartments. Good moisture protection can be achieved more easily for unit dose compartments such as blisters, however. foils used to seal the blisters and subsequent drug formulation lose viability with long storage.
  • Dry powder inhalers such as those describe in U.S. Pat. No. 7,305,986 and U.S. patent application Ser. No. 10/655,153 (US 20040182387), the disclosures of which are incorporated herein by reference in their entirety for all they disclose regarding dry powder inhalers, can generate primary drug particles or suitable inhalation plumes during an inspiratory maneuver by deagglomerating the powder formulation within a capsule.
  • the amount of fine drug discharged from the inhaler's mouthpiece during inhalation is largely dependent on the interparticulate forces in the powder formulation (between drug and drug particles or between drug and excipient particles) and the efficiency of the airflow as measured by pressure drop and flow rate entering and exiting the dry powder dispenser.
  • the benefits of delivering drugs via the pulmonary circulation are numerous and include, rapid absorption into the arterial circulation, avoidance of drug degradation by liver metabolism, ease of use, i.e., lack of discomfort of administration by other routes of administration.
  • Dry powder inhaler products developed for pulmonary inhalation have met with limited success to date, due to lack of practicality.
  • Dry powder inhaler systems for pulmonary delivery of pharmaceuticals are disclosed.
  • the dry powder inhalation systems comprise a dry powder inhalation device or inhaler and at least one cartridge containing a pharmaceutical formulation comprising at least one active ingredient for delivery to the pulmonary circulation.
  • the present inhalation systems provide rugged devices which are reusable, use pre-metered unit dose cartridges and can be separated into their principal component parts for ease of cleaning.
  • the devices also provide high resistance inhalation systems which enable deagglomeration of dry powder particles, have consistent airflow and are simple and easy to use.
  • a dry powder inhaler comprises a housing, and a mouthpiece, wherein the housing comprises a mouthpiece engaging section structurally configured to engage with the mouthpiece, and the mouthpiece being removable at predetermined positions relative to the housing, and having a conduit permitting airflow between an air inlet and an air exit port, and comprising a chamber and an oral placement section; the mouthpiece further being structurally configured to be moveable within the housing in an engaged position and releasable from the housing at a predetermined position.
  • the dry powder inhaler mouthpiece is structurally configured to receive, hold and/or release a medicament containing cartridge in the chamber.
  • the housing comprises a container structurally configured to adapt to the mouthpiece and has one or more openings for allowing air intake into the mouthpiece chamber.
  • the housing has securing mechanisms to hold the mouthpiece chamber and permit the mouthpiece assembly to be moveable within the housing to a storage position, to a cartridge loading/unloading position, mouthpiece separable position, to an inhalation position and in reversed order.
  • the dry powder inhaler mouthpiece assembly can move relative to the housing and the movement of the mouthpiece within the housing can reconfigure a cartridge seated in the inhaler from a closed configuration to an open configuration, or from an open to a closed configuration.
  • Movement of the mouthpiece within the housing can be of various types, such as translational or rotational.
  • movement about the housing is rotational, and can be restricted at predetermined locations relative to the housing to provide registration of positions of the mouthpiece in use.
  • movement of the mouthpiece assembly is rotational and the mouthpiece can rotate from the storage position to a cartridge loading/unloading position to an inhalation position.
  • the mouthpiece further comprises a mouthpiece oral placement section and a medicament containing cartridge receiving section; the cartridge receiving section configured to permit and direct air flow through and around the cartridge.
  • a dry powder inhaler comprising a housing, and a mouthpiece assembly, the housing having a top wall, a bottom wall, side walls; a mouthpiece engaging section, a mouthpiece storage section, and an air intake section having a conduit with a first opening to allow ambient air intake and a second opening in communication with the mouthpiece engaging section which allows air flow therethrough; the mouthpiece subassembly being removable and comprising a chamber structurally configured to house a cartridge and to engage with the mouthpiece engaging section of the housing; an oral placement section extending from the chamber and having an air inlet which communicates with the chamber and an air outlet in communication with ambient air.
  • a breath-powered inhaler comprising, an inhaler with resistance values that can be tunable or changed as required by the patient being an adult or a child.
  • the resistance values of the inhaler can be altered by changing the geometries or configuration of the air conduits so that airflow distribution through the cartridge and around the cartridge can vary.
  • inhaler resistance values can range between 0.08 and 0.15 ⁇ kPa/liters per minute.
  • flow balance distribution can range from about 10% to about 30% through the cartridge and from about 70% to 90% going around the cartridge.
  • the dry powder inhalation system comprises a breath-activated dry powder inhaler, a cartridge containing medicament, wherein the medicament can comprise a diketopiperazine and an active agent.
  • the active agent comprises peptides and proteins.
  • the inhalation system comprises a cartridge containing medicament wherein the peptide or protein can be an endocrine hormone: including, insulin, glucose-like peptide (GLP-1), parathyroid hormone, parathyroid hormone related protein (PTHrP), and the like.
  • the dry powder inhalation system can comprise a cartridge including a formulation for pulmonary delivery which can be provided for use with different dosage strengths, wherein the system can deliver the dosage with consistency and in a linear manner.
  • a cartridge including a formulation for pulmonary delivery which can be provided for use with different dosage strengths, wherein the system can deliver the dosage with consistency and in a linear manner.
  • multiple cartridges of a single dose to be administered to a subject can be interchangeably replaced or substituted by providing the system with a single cartridge of the sum of the dosage strength of the multiple cartridges, wherein the system can deliver a bioequivalent dose with a single cartridge.
  • FIG. 1 illustrates a three dimensional side view of an embodiment of a dry powder inhaler in a storage position.
  • FIG. 2 illustrates the back side view of the dry powder inhaler of FIG. 1 showing the mouthpiece subassembly moved from the storage position to a cartridge loading position wherein the cap is opened. In this embodiment, this is also the position at which the mouthpiece can be separated.
  • FIG. 3 illustrates the back side view of the dry powder inhaler of FIG. 1 showing the mouthpiece subassembly has been moved to the inhalation position for use.
  • FIG. 4 illustrates the back side view of the dry powder inhaler of FIG. 1 showing the mouthpiece subassembly has been moved to an unloading position after inhalation.
  • FIG. 5 illustrates the dry powder inhaler of FIG. 1 , showing the housing subassembly and the mouthpiece subassembly disengaged from one another.
  • FIG. 6 illustrates a top view section of a housing subassembly of a dry powder inhaler.
  • FIG. 7 illustrates the dry powder inhaler shown in FIG. 3 in cross-section.
  • FIG. 8 illustrates the dry powder inhaler of FIG. 1 , showing an exploded view of the housing subassembly.
  • FIG. 9 illustrates the dry powder inhaler of FIG. 1 , showing the mouthpiece subassembly removed from the housing component.
  • FIG. 10 illustrates the dry powder inhaler of FIG. 1 , showing an exploded view of the mouthpiece subassembly.
  • FIG. 11 illustrates an alternate embodiment of the dry powder inhaler system showing the inhaler in a cartridge loading position.
  • FIG. 1 also depicts a cartridge embodiment for use with a dry powder inhaler according to the present description.
  • FIG. 12 illustrates the embodiment of FIG. 11 with a cartridge loaded into the dry powder inhaler with the cap open.
  • FIG. 13 illustrates the embodiment of FIG. 11 showing the dry powder inhaler in an inhalation position.
  • FIG. 14 illustrates the embodiment of FIG. 13 showing the dry powder inhaler in inhalation position as a cross-section through the mid-longitudinal axis.
  • FIG. 15 illustrates a cross-section of an embodiment wherein the dry powder inhaler is shown in the dosing position and containing a cartridge.
  • FIG. 16 illustrates an embodiment of a three dimensional side view of a cartridge for use with the dry powder inhalation system.
  • FIG. 17 illustrates an embodiment of a three dimensional back side view cartridge for use with the dry powder inhalation system.
  • FIG. 18 illustrates an embodiment of an exploded three dimensional view of the cartridge for use with the dry powder inhalation system.
  • FIG. 19 illustrates a mean baseline-corrected GIR (glucose infusion rate) for two 15 U cartridges and one 30 U cartridge of an inhalation powder comprising insulin and fumaryl diketopiperazine, and for 10 IU of RAA.
  • FIG. 20A depicts a schematic representation of a cartridge loaded into a cartridge rig in cross-section for measuring pressure across the cartridge.
  • FIG. 20B illustrates a diagram of a resistance circuit illustrating the various resistors associated with the cartridge rig illustrated in FIG. 20A .
  • FIG. 21A illustrates a schematic representation of a portion of the inhaler in cross-section showing components parts.
  • FIG. 21B illustrates a diagram of a resistance circuit of an inhaler embodiment of FIG. 21A used for measuring the resistance and pressure of the device.
  • FIG. 22 depicts a linear regression plot illustrating the resistance measured through an exemplary cartridge rig tested or R 3 , at flow rates between 2 and 9 liters/min.
  • dry powder inhalation systems for delivering pharmaceutical medicaments to the pulmonary circulation.
  • the inhalation systems comprise a breath-powered or breath activated, dry powder inhaler, one or more cartridges containing a pharmaceutical formulation comprising one or more pharmaceutically active substances or active ingredients, and a pharmaceutically acceptable carrier.
  • dry powder inhaler 100 comprises housing 102 , and removable mouthpiece assembly or subassembly 104 .
  • FIG. 1 illustrates dry powder inhaler 100 in a closed or storage position, wherein mouthpiece oral placement section 106 (illustrated in FIG. 2 ) is stowed away under cover 108 .
  • FIG. 1 also illustrates cover or lid 110 over mouthpiece chamber 112 (illustrated in FIG. 2 ). In one embodiment of FIG.
  • housing 102 is structurally configured to be relatively rectangular in shape and has top wall 114 , bottom wall 116 , back wall 118 , first side wall 120 , second side wall (not illustrated), mouthpiece engaging section 122 , mouthpiece storage section 124 , and an air intake section as part of housing 102 .
  • FIG. 2 illustrates dry powder inhaler 100 from FIG. 1 , showing the inhaler in a cartridge loading/unloading position with lid 110 open to allow a mating cartridge to be inserted into the central cavity of mouthpiece chamber 112 .
  • FIG. 2 also illustrates removable mouthpiece subassembly 104 is movable from the storage position in the housing to about 90° relative to longitudinal x-axis 202 of housing 102 rotated about y-axis 204 .
  • the cartridge loading/unloading position of mouthpiece assembly 104 can be any predetermined angle as desired. As illustrated in FIG.
  • mouthpiece engaging section 122 of housing 102 is relatively circular in shape on the side wall and is shorter in height compared to the rest of housing 102 to accommodate mouthpiece chamber 112 and can form one end of inhaler 100 .
  • Housing 102 can also comprise an air conduit with one or more first openings to allow ambient air intake and a second opening in communication with mouthpiece engaging section 122 which allows air flow from the intake section through the conduit into mouthpiece chamber 112 in the inhalation position.
  • FIG. 3 depicts dry powder inhaler 100 illustrated in FIG. 1 , showing removable mouthpiece assembly 104 in an extended or inhalation position.
  • removable mouthpiece assembly 104 is at about 180° angle relative to the longitudinal x-axis 202 of housing 102 rotated about y-axis 204 .
  • the inhalation position of mouthpiece assembly 104 can be varied depending on the structural configuration of the cartridge design to be adapted with the inhaler, and the rotational degrees a cartridge may be rotated to properly align apertures that allow air to enter and exit the cartridge carrying a plume of medicament into mouthpiece exit port 302 .
  • FIG. 5 illustrates dry powder inhaler 100 of FIG. 1 comprising the component parts, removable mouthpiece assembly 104 and housing 102 .
  • Removable mouthpiece assembly 104 comprising mouthpiece chamber 112 structurally configured with cartridge holder area 502 , one or more belts 504 and one or more flanges 506 , lid 110 and air inlet port 508 which communicates with the housing second opening to engage with mouthpiece engaging section 122 of housing 102 ; mouthpiece oral placement section 106 extending from mouthpiece chamber 112 and having air inlet port 508 which communicates with mouthpiece chamber 112 and mouthpiece exit port 302 which is in communication with ambient air.
  • Drive key 510 structurally configured to have indicator 512 , for example, in the shape of a tear drop for proper placement of a cartridge in dry powder inhaler 100 is also shown in FIG. 2 and FIG. 5 .
  • indicator 512 for example, in the shape of a tear drop for proper placement of a cartridge in dry powder inhaler 100 is also shown in FIG. 2 and FIG. 5 .
  • Proper alignment of a cartridge in the inhaler indicates the correct relative rotational orientation and determines successful cartridge seating, insertion and emptying in use. In such an embodiment, a cartridge cannot be properly seated unless tear drop 1602 of cartridge 1600 ( FIG. 11 ) and drive key 510 align with one another.
  • Lid 110 is positioned over mouthpiece chamber 112 and is mechanically connected to removable mouthpiece assembly 104 by hinge 514 .
  • Lid 110 has an outer surface and an inner surface and it is structurally configured with an anvil in its inner top surface and relatively centered within the top. Lid 110 can only be opened when removable mouthpiece assembly 104 is in the loading/unloading position.
  • an interlocking mechanism prevents movement to a dosing/inhalation position or to a storage position when lid 110 is opened or raised.
  • the interlocking mechanism can comprise, for example, one or more belts or flexible radial arms, which are incorporated into the walls of mouthpiece chamber 112 and act as a self-synching mechanism 602 in FIG. 6 .
  • the interlocking mechanism allows removable mouthpiece assembly 104 to obtain proper registration of the various positions when dry powder inhaler 100 is in use.
  • Lid 110 can be maintained in a closed position by a locking mechanism, for example, a spring loaded boss such as a lock-out button which can engage a receiving detent within housing 102 .
  • the locking mechanism comprises an upward extension of the housing wall.
  • the locking mechanism 602 can also serve to secure the mouthpiece subassembly against further rotation. Position registration of removable mouthpiece assembly 104 allows the inhaler to be properly used and prevents movement of removable mouthpiece assembly 104 to the dosing position without lid 110 being depressed.
  • FIG. 5 also illustrates housing 102 separated from removable mouthpiece assembly 104 showing mouthpiece engaging section 122 having an opening or cavity 516 with top wall 114 partially discontinuous to adapt, receive and hold removable mouthpiece assembly 104 and structurally configured to accommodate the mouthpiece.
  • Housing 102 is configured to have an upward projection of the wall or second flange 518 around the top outer portion of mouthpiece engaging section 122 and a protrusion configured as a drive key in its bottom wall configured to mate with a keying structure of a cartridge.
  • the proper alignment of a cartridge within dry powder inhaler 100 is dependent on drive key 510 having an indicator 512 and one or more indentation 126 ( FIG. 2 ) in removable mouthpiece assembly 104 and drive key 510 and of housing 102 .
  • FIG. 7 illustrates a cross sectional view of dry powder inhaler 100 in a dosing or inhalation position.
  • housing 102 has a substantially rectangular shape, however other shapes are also suitable.
  • Housing 102 comprises one or more inlet ports or first openings 702 , air conduit 704 housing piston 706 and spring 708 , and outlet port 710 opening into mouthpiece engaging section 122 and aligns with the inlet port of mouthpiece chamber 112 .
  • Air conduit 704 has one or more openings 712 that allow airflow to enter.
  • Mouthpiece engaging section 122 is partially configured in the shape of a cup further comprising second drive key 802 as seen in FIG. 8 from bottom wall 116 configured to receive and hold a medicament containing cartridge.
  • FIG. 7 also shows the engagement between flange 506 of mouthpiece chamber 112 in housing 102 ; hinge 514 , lid 110 and mouthpiece oral placement section 106 with tongue depressor 402 and airflow conduit 714 of removable mouthpiece assembly 104 .
  • FIG. 8 depicts an exploded view of housing 102 illustrating integral components of dry powder inhaler 100 , including plug 608 , piston 706 and spring 708 which assemble into air conduit 704 ; housing 102 outer structure comprising back wall 118 , side wall 120 , top wall 114 , and bottom wall 116 ; mouthpiece engaging section 122 with second drive key 802 , and slide door 804 which covers the storage compartment for mouthpiece oral placement section 106 .
  • Air conduit 704 is configured to have an aperture or opening 712 which allows and directs airflow entering housing 102 into mouthpiece engaging section 122 during an inspiratory maneuver.
  • Mouthpiece engaging section 122 can also comprise a securing mechanism which can comprise protrusions or projections from the inner wall of the chamber which mates with flange 506 and mating structure 902 as seen in FIG. 9 of mouthpiece chamber 112 .
  • piston 706 and compression spring 708 act as an indicator mechanism positioned in air conduit 704 of housing 102 structurally configured to indicate inspiratory effort.
  • Piston 706 and spring 708 can be placed at other positions in the airflow pathway of dry powder inhaler 100 .
  • airflow entering the air conduit 704 within housing 102 goes around piston 706 , and moves piston 706 to compress spring 708 .
  • This airflow control mechanism during inhalation indicates inspiratory effort through a tactile sensation.
  • removable mouthpiece assembly 104 is rotated from a storage position to a cartridge loading/unloading position wherein lid 110 is opened and a cartridge containing medicament is placed into mouthpiece chamber 112 and securely seated.
  • Lid 110 contains an anvil 1102 ( FIG. 11 ) inside which, if a cartridge is inserted in the correct position, the anvil will further insure the cartridge achieves a proper vertical alignment.
  • a downward push of lid 110 closes the cover and removable mouthpiece assembly 104 can rotate to the dosing position, wherein a registration securement holds removable mouthpiece assembly 104 in place. If the proper vertical alignment is not achieved lid 110 cannot be fully closed and subsequent removable mouthpiece assembly 104 rotation cannot occur. This provides an interlock mechanism.
  • FIG. 9 illustrates removable mouthpiece assembly 104 which has been separated from housing 102 .
  • Removable mouthpiece assembly 104 comprises mouthpiece chamber 112 , lid 110 articulated to removable mouthpiece assembly 104 so that in a closed position lid 110 covers mouthpiece chamber 112 , and mouthpiece oral placement section 106 having airflow conduit 714 with mouthpiece exit port 302 .
  • Mouthpiece chamber 112 comprises air inlet port 508 , one or more flanges 506 having gaps and mating structure 902 for mating with and securing removable mouthpiece assembly 104 with housing 102 .
  • Flange 506 positioned at the bottom end of mouthpiece chamber 112 is provided which is structurally configured to engage with housing 102 , and comprises multiple segments having gaps in between the segments; the gaps section contains mating structure 902 for mating with housing 102 .
  • the multiple segments of flange 506 and gaps between the segments can be position at predetermined positions of mouthpiece chamber 112 to effectuate proper securement of removable mouthpiece assembly 104 in housing 102 .
  • FIG. 10 is an exploded view of removable mouthpiece assembly 104 .
  • Mouthpiece chamber 112 comprises drive key 510 with indicator 512 , lid 110 , mouthpiece oral placement section 106 , cartridge securing mechanism 1002 , a radial spring 1004 , one or more belts 504 and interlock detents 1006 .
  • Alternate housing 1104 in this embodiment has an air inlet located in one of the side walls; however, in alternate embodiments the air inlet can be one or more holes placed in other positions, for example, in alternate housing bottom wall 1106 .
  • Alternate dry powder inhaler 1100 can have one or more openings in the housing of variable size or shape and locations.
  • Cartridges such as cartridge 1600 can be adapted to the dry powder inhaler containing a dry powder medicament for inhalation, and are configured to deliver a single unit dose of a medicament.
  • cartridge 1600 can be structurally configured to contain a dose of, for example, 0.5 mg to about 30 mg of dry powder for inhalation.
  • FIG. 12 illustrates an alternate dry powder inhaler 1100 with cartridge 1600 loaded and ready for closure of lid 110 .
  • lid 110 is in the open position, mouthpiece chamber 112 and alternate housing 1104 with alternate air inlet 1202 .
  • FIG. 13 depicts the dry powder inhaler system of FIG. 12 in the dosing position and ready for inhalation.
  • FIG. 14 depicts a cross-section of alternate dry powder inhaler 1100 of FIG. 13 , showing the internal features of the inhaler and cartridge system.
  • Lid 110 securely holds cartridge 1600 by way of anvil 1102 , which is then securely installed in mouthpiece chamber 112 .
  • the medicament containing cartridge 1600 as shown in FIGS. 16-18 can comprise a structure with a defined shape having a wall with one or more first apertures 1604 , second aperture 1702 and third aperture 1802 , tear drop 1602 , grasping feature 1606 , and first inhaler keying mechanism 1608 and second inhaler keying mechanism 1610 .
  • Cartridge 1600 has a closed configuration moveable to an open configuration for dosing a powder medicament or from an open to a closed position after use.
  • Cartridge 1600 further comprises an outer surface and an inner surface defining an internal volume; wherein the closed configuration restricts communication, such as air transit to or through the internal volume, and the open configuration forms an air passage through the internal volume to allow a powder medicament contained therein to be aerosolized and delivered to a patient in an airflow stream created by the user.
  • the open configuration is established by providing one or more apertures (e.g. first aperture 1604 , second aperture 1702 and third aperture 1802 ), holes, slits or windows in the cartridge walls that can have beveled edges to direct airflow.
  • cartridge 1600 can be configured of two elemental parts, for example, two segments (e.g.
  • cartridge 1600 can be structurally configured as two separate elements which can fit into one another and be moveable about one another; each having openings which can align with one another, similarly as the capsules described in U.S. Pat. No. 7,305,986, which is fully incorporated herein by reference as if part of this specification.
  • cartridge 1600 is designed to integrally function with the dry powder inhaler and can be moved within the inhaler to predetermined positions
  • a method of delivering an active ingredient comprising: a) providing a dry powder inhaler comprising, a housing and a mouthpiece, the mouthpiece comprising a chamber containing a cartridge with a dry powder formulation comprising a diketopiperazine and the active agent; the inhaler having a flow distribution of about 10% to 30% of the airflow going through the cartridge, and b) delivering the active ingredient to an individual in need of treatment by inhaling deep and rapidly for about 4 to 6 seconds and optionally repeating step b).
  • the dry powder inhaler can deliver a dose of a dry powder formulation to a patient at pressure differentials between 2 and 20 kPa.
  • the method of treating hyperglycemia and/or diabetes comprises the administration of an inhalable dry powder composition comprising a diketopiperazine having the formula 2,5-diketo-3,6-di(4-X-aminobutyl)piperazine, wherein X is selected from the group consisting of succinyl, glutaryl, maleyl, and fumaryl.
  • the dry powder composition can comprise a diketopiperazine salt.
  • the inhalation system comprises a breath-activated dry powder inhaler, a cartridge containing medicament, wherein the medicament can comprise a diketopiperazine and an active agent.
  • the active agent comprises peptides and proteins.
  • the inhalation system comprises a cartridge containing medicament wherein the peptide or protein can be an endocrine hormone, including, insulin, GLP-1, calcitonin, parathyroid hormone, parathyroid hormone related protein (PTHrP), and analogs thereof and the like.
  • the dry powder medicament may comprise a diketopiperazine and a pharmaceutically active ingredient.
  • the pharmaceutically active ingredient can be any type.
  • the active ingredient comprises a peptide, a protein, a hormone, analogs thereof or combinations thereof, wherein the active ingredient is insulin, parathyroid hormone 1-34, glucagon-like peptide-1 (GLP-1), oxyntomodulin, peptide YY, interleukin 2-inducible tyrosine kinase, Bruton's tyrosine kinase (BTK), inositol-requiring kinase 1 (IRE1), heparin, or analogs thereof.
  • the pharmaceutical composition comprises fumaryl diketoperazine and insulin.
  • the system can use two 15 U cartridges of an inhalation powder comprising insulin and FDKP or the system can use one 30 U single cartridge containing an inhalation powder comprising FDKP and deliver bioequivalent doses of insulin to a patient.
  • the system can be used to deliver higher doses, for example, three 15 U cartridges of an inhalation powder comprising insulin and FDKP can be used, or one 15 U cartridge plus one 30 U cartridge, or a single 45 U cartridge containing the inhalable insulin and FDKP formulation; or four 15 U cartridges of an insulin and FDKP formulation can be interchangeable with one 60 U cartridge of insulin and FDKP formulation.
  • two 30 U cartridges containing an inhalable insulin and FDKP formulation can be interchanged for one 60 U cartridge of the insulin and FDKP formulation.
  • the dry powder inhalation system accomplishes insulin exposure proportional to a dosage so that the dosages are interchangeable.
  • the dosage can be provided as filled dose.
  • a phase I, open-label, single-dose, repeat administration study in subjects with type 1 diabetes (T1DM) was conducted to assess the pharmacokinetic profile or PK of 30 U of insulin-FDKP dosed as a single 30 U cartridge and compared to two 15 U cartridges administered with the present inhalation system.
  • Subjects (age: 19-61 yrs) were randomized to 1 of 6 sequences. Fasted subjects received insulin-FDKP or RAA 4 to 6 hrs after initiating a hyperinsulinemic-euglycemic clamp.
  • Randomization determined the order of insulin-FDKP dosing (first 2 treatment (tx) visits), and the location of the RAA injection (abdomen, arm or leg; 3 rd tx visit). After dosing blood samples were taken and analyzed for insulin, insulin lispro and fumaryl diketopiperazine (FDKP (insulin-FDKP tx only)). When studying insulin-FDKP, the basal insulin infusion was performed with HUMALOG®, and when studying HUMALOG®, regular human insulin was used. The analytical methodologies enabled the independent measurement of each insulin tested.
  • Table 1 shows the results from the study.
  • the mean insulin exposures (AUC 0-360 ) of a single 30 U cartridge or two 15 U cartridges were comparable.
  • FDKP mean exposure (AUC inf ) was also similar. Insulin and FDKP exposure, t max and t 1/2 (FDKP) were the same regardless of the number of cartridges. Due to the significantly different PK profiles of insulin-FDKP and RAA, the mean relative exposure (AUC) ratio is dependent upon the time interval studied.
  • the mean relative insulin exposure (insulin-FDKP: HUMALOG® AUC, dose normalized geometric means) when assessed at time intervals of 0-180 min and 0-360 min was 24% to 18%.
  • FIG. 19 illustrates the results of the GIR evaluation.
  • the data show the mean baseline-corrected glucose infusion rate (GIR) for two 15 U cartridges and one 30 U cartridge of insulin-FDKP inhalation powder and for the 10 IU of RAA.
  • GIRs after both treatments of insulin-FDKP inhalation powders reached a maximum level by approximately 30 minutes after administration, whereas GIR peaked approximately 150 minutes after administration of sc RAA.
  • the GIRs for insulin-FDKP inhalation powder returned toward baseline by approximately 180 minutes versus 300 minutes for RAA.
  • the glucose-lowering effect of insulin-FDKP inhalation powder of both dosage forms tested was comparable based on GIR AUC, GIR max , and GIRt max .
  • the total inhaler and cartridge resistance can be measured due to inlet and outlet ports of a cartridge acting as resistors in series.
  • the resistance due to the inlet port is measured in the cartridge rig.
  • the representation of a circuit diagram form for the cartridge rig is illustrated in FIGS. 20A and 20B , wherein the cartridge sits in the holder in an open configuration and the circuitry is defined such that R 3 represents the resistance to airflow into the cartridge; R 4 represents the resistance to airflow leaving the cartridge; Pa is the pressure differential across the cartridge and P represents the pressure measured across the inlet and outlet ports.
  • the resistance due to the inhaler system comprising the inhaler and cartridge is determined as illustrated in FIGS.
  • R 1 represents the resistance due to the float or valve
  • R 2 represents the resistance to air flow around the cartridge
  • R 3 represents the resistance to airflow through the cartridge
  • R 4 represents the resistance to airflow leaving the cartridge
  • P represents the measured pressure
  • Pa represents the pressure across the system
  • F represents the total flow measurement.
  • R 3 was determined from the formula:
  • the resistance due to the inlet and outlet ports were determined and the values used to calculate the flow balance of the system in particular the flow balance through the cartridge using the formula above, which is determined as the ⁇ P divided by R 3 .
  • the flow balance distribution through the cartridge for the present inhaler and cartridge system was calculated to be in the range from about 10% to about 30% with an average of approximately 15.92%.
  • FIG. 22 depicts a linear regression plot illustrating the resistance measured through an exemplary cartridge rig tested or R 3 , at flow rates between 2 and 9 liters/min. As shown in FIG. 22 , the resistance through the cartridge (R 2 ) tested was determined as equaling to 0.999 ⁇ kPa/liters per minute.
  • the inhalers can be structurally configured to have tunable airflow resistance by varying the cross-sectional area at any section of the airflow pathway of the inhaler and cartridge system.

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US16/718,732 US20200121869A1 (en) 2008-03-27 2019-12-18 Dry powder inhalation system
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