US20200155524A1 - Method for reducing side effects from administration of phosphodiesterase-4 inhibitors - Google Patents
Method for reducing side effects from administration of phosphodiesterase-4 inhibitors Download PDFInfo
- Publication number
- US20200155524A1 US20200155524A1 US16/563,435 US201916563435A US2020155524A1 US 20200155524 A1 US20200155524 A1 US 20200155524A1 US 201916563435 A US201916563435 A US 201916563435A US 2020155524 A1 US2020155524 A1 US 2020155524A1
- Authority
- US
- United States
- Prior art keywords
- roflumilast
- phosphate
- formulation
- cream
- composition
- 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
Links
- 239000002587 phosphodiesterase IV inhibitor Substances 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 34
- 230000000694 effects Effects 0.000 title claims abstract description 28
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- 239000010452 phosphate Substances 0.000 claims abstract description 96
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Images
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
- A61K31/44—Non condensed pyridines; Hydrogenated derivatives thereof
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/06—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
- A61K47/08—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite containing oxygen, e.g. ethers, acetals, ketones, quinones, aldehydes, peroxides
- A61K47/10—Alcohols; Phenols; Salts thereof, e.g. glycerol; Polyethylene glycols [PEG]; Poloxamers; PEG/POE alkyl ethers
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- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/06—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
- A61K47/24—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite containing atoms other than carbon, hydrogen, oxygen, halogen, nitrogen or sulfur, e.g. cyclomethicone or phospholipids
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/0012—Galenical forms characterised by the site of application
- A61K9/0014—Skin, i.e. galenical aspects of topical compositions
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/06—Ointments; Bases therefor; Other semi-solid forms, e.g. creams, sticks, gels
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/10—Dispersions; Emulsions
- A61K9/12—Aerosols; Foams
- A61K9/122—Foams; Dry foams
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P11/00—Drugs for disorders of the respiratory system
- A61P11/06—Antiasthmatics
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61P11/00—Drugs for disorders of the respiratory system
- A61P11/08—Bronchodilators
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K45/00—Medicinal preparations containing active ingredients not provided for in groups A61K31/00 - A61K41/00
- A61K45/06—Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
Definitions
- the present invention pertains to the field of topical medications for the treatment of medical disorders.
- the invention pertains to topical formulations containing an active pharmaceutical ingredient that is an inhibitor of the enzyme phosphodiesterase-4.
- the formulations are pharmaceutically efficacious but have decreased gastrointestinal side effects.
- Drugs that inhibit the enzyme phosphodiesterase-4 have been found to be useful in the medical treatment of many medical conditions, most notably psoriatic arthritis, psoriasis, atopic dermatitis, asthma, and chronic obstructive pulmonary disease (COPD).
- PDE-4 phosphodiesterase-4
- Examples of such drugs include apremilast, cilomilast, crisaborole, ibudilast, piclamilast, roflumilast, and rolipram.
- these drugs are clinically useful, their use has been limited at times due to the high incidence of side effects including diarrhea, weight loss, nausea, headache, back pain, insomnia, dizziness, flu-like symptoms and decreased appetite, that are associated with their administration. These side effects, especially the gastrointestinal side effects, can have a significant influence on patient compliance.
- Roflumilast (3-cyclopropylmethoxy-4-difluoromethoxy-N-[3,5-di-chloropyrid-yl]-benzamide) and its active metabolite roflumilast N-oxide (3-cyclopropylmethoxy-4-difluoromethoxy-N-(3,5-dichloropyrid-4-yl 1-oxide)benzamide) are described herein as representative members of the class of drugs that inhibit PDE-4.
- Roflumilast is known to be suitable as a bronchial therapeutic agent as well as for the treatment of inflammatory disorders.
- compositions containing roflumilast are used in human and veterinary medicine and have been proposed for the treatment and prophylaxis of diseases including but not limited to: inflammatory and allergen-induced airway disorders (e.g. bronchitis, asthma, COPD); dermatoses (e.g. proliferative, inflammatory and allergen induced skin disorders), and generalized inflammations in the gastrointestinal region (Crohn's disease and ulcerative colitis).
- roflumilast is administered systemically to treat inflammatory disorders involving the lungs, such as asthma and chronic obstructive pulmonary disease (COPD).
- COPD chronic obstructive pulmonary disease
- Roflumilast and its synthesis were described in U.S. Pat. No. 5,712,298 (the “298 patent”), incorporated herein by reference.* Roflumilast is approved in the United States under the trade name DALIRESP® (AstraZeneca Pharmaceuticals LP, Wilmington, Del.) and in Europe under the trade name DAXAS® (Takeda GmbH, Konstanz, Germany). Both DALIRESP® and DAXAS® are administered orally once daily as 500 mcg tablets for treatment of COPD. * Unless otherwise indicated, references incorporated herein by reference are incorporated in their entireties for all purposes.
- the prescribing information pertaining to DALIRESP® instructs that it may be beneficial to take half of the therapeutically effective dose, 250 mcg, once daily for 4 weeks prior to commencing the therapeutically effective dose of 500 mcg per day in order to reduce the rate of treatment discontinuation.
- the prescribing information for DAXAS® does not instruct the patient to take a reduced non-therapeutically effective dosage prior to taking the therapeutic dose.
- the prescribing information for DAXAS® does report a high incidence of diarrhea, nausea, and abdominal pain associated with this medication.
- Bolle U.S. Patent Application Publication No. 2006/0084684 discloses topical formulations of roflumilast, salts of roflumilast, the N-oxide of roflumilast, and salts of the N-oxide.
- Bolle discloses that such formulations are useful to apply to skin lesions for the local treatment of skin disorders or to administer topically for the systemic treatment of skin disorders and other disorders, such as COPD.
- Bolle discloses that the systemic effect of topical application of the roflumilast formulations is comparable to that of an oral dosage form.
- Bolle further discloses, in paragraph 0080 that “Comparison with oral administration shows that, irrespective of the composition of the topical preparation, similar Cmax and AUCs and similar excretions with the urine are achieved.”
- Topical application of potent pharmacological agents like roflumilast has been found to provide superior delivery and greater ease of use for patients.
- the molecular structure of the compound ultimately dictates the ability of the drug to cross the epithelium of the tissue to which the product is applied.
- selection of the components of the formulation dictates the maximum skin permeation that the formulator can achieve.
- Creams, lotions, gels, ointments and foams are just a few of the more familiar forms of topical products that contain active pharmaceutical ingredients (API) for application to the skin.
- API active pharmaceutical ingredients
- a pharmaceutical formulation containing a PDE-4 inhibitor such as roflumilast, that, when administered systemically, in a therapeutically effective dose, does not result in a spike in Cmax, while still providing a high AUC, and which, therefore, is pharmaceutically efficacious but is associated with a decreased incidence of gastrointestinal side effects.
- phosphate ester surfactants in a topical formulation containing a PDE-4 inhibitor reduces the spike in Cmax while still producing a high AUC.
- the reduction in the spike in Cmax reduces gastrointestinal side effects which will lead to better patient compliance.
- FIG. 1 is a line graph comparing the pharmacokinetic (PK) profile of two formulations of the invention, Formulation 1 and Formulation 2, and a PK profile of a formulation of the prior art, Formulation 3.
- PK pharmacokinetic
- FIG. 3 is a line graph showing Day 1 and Day 28 PK profiles after once daily dosing of 0.15% roflumilast topical cream.
- FIG. 4 is a line graph showing Day 1 and Day 14 PK profiles after once daily dosing of 0.3% roflumilast topical cream.
- FIG. 5 is a line graph showing Day 1 and Day 28 PK profiles after once daily dosing of 0.5% roflumilast topical cream.
- FIG. 6 is a line graph showing Day 1 and Day 28 PK profiles after once daily dosing of 1.0% roflumilast topical cream.
- FIGS. 7A, 7B and 7C show changes in baseline in Target Plaque Severity Score and/or Target Plaque Area for 0.15% roflumilast topical cream and 0.5% roflumilast topical cream.
- FIGS. 8A and 8B show roflumilast and roflumilast N-oxide plasma concentrations at day 1 and day 28 (pharmacokinetic population) for 0.15% roflumilast topical cream and 0.5% roflumilast topical cream.
- FIG. 9 is a line graph showing Day 1 single dose and Day 8 steady state pharmacokinetic profiles for the PDE4 inhibitor crisaborole after application of once daily Eucrisa® topical ointment.
- FIG. 10 is a line graph showing Day 1 single dose PK profiles after once daily dosing of Crodafos-CES creams containing either 0.3% crisaborole or 0.3% roflumilast.
- PDE-4 inhibitor refers to one or more members of the class of drugs that, when administered to a person, inhibit the enzyme phosphodiesterase-4.
- members of this class of drug include apremilast, cilomilast, crisaborole, ibudilast, piclamilast, roflumilast, and rolipram.
- roflumilast refers to roflumilast, its salts, the N-oxide of roflumilast, and its salts unless specified otherwise or unless it is clear in context that reference is to roflumilast itself.
- N-oxide of roflumilast and “salts of either roflumilast or of the N-oxide of roflumilast” refer specifically to the N-oxide or salts of either roflumilast or the N-oxide thereof.
- Roflumilast is described herein, both as a representative member of the class of PDE-4 inhibitors and as roflumilast itself, which includes, depending on context, roflumilast itself, its salts, the N-oxide of roflumilast, and salts of the N-oxide.
- Roflumilast formulations can be prepared by methods known in the art (e.g. see the '298 patent and U.S. application Ser. No. 14/075,035).
- Roflumilast is a Compound of the Formula (I)
- R1 is difluoromethoxy
- R2 is cyclopropylmethoxy
- R3 is 3,5-dichloropyrid-4-yl.
- This compound has the chemical name N-(3,5-dichloropyrid-4-yl)-3-cyclopropylmethoxy-4-difluoromethoxybenzamid-e (INN: roflumilast).
- salts when referring to roflumilast or the N-oxide of roflumilast, means a salt as described in paragraphs [0012] and [0013] of U.S. Patent Application Publication No. US 2006/0084684, the disclosure of which is incorporated herein by reference.
- a pharmaceutical formulation such as a topically applied pharmaceutical formulation containing a PDE-4 inhibitor, such as roflumilast, provides an altered PK (pharmacokinetic) profile with a reduced Cmax or a reduced absorption rate to reach Cmax when the formulations contain one or more phosphate ester surfactants compared to pharmaceutical formulations containing the PDE-4 inhibitor without a phosphate ester surfactant(s).
- a pharmaceutical formulation containing roflumilast and one or more phosphate ester surfactants when topically administered to an individual, provides a systemically effective level of the PDE-4 inhibitor comparable to, or even greater than, that achieved with oral administration by slow absorption and without a Cmax spike of the PDE-4 inhibitor into the bloodstream.
- a formulation containing a PDE-4 inhibitor drug, such as roflumilast, and a phosphate ester surfactant when administered to an individual, such as by applying topically to the skin of an individual, provides a sufficiently high Area Under the Curve (AUC) to attain a systemically effective level of the PDE-4 inhibitor drug without rapidly producing a peak plasma concentration (Cmax) that is associated with gastrointestinal side effects. That is, the absorption rate of the drug to reach Cmax is decreased when the formulation of the present application is administered, compared with the administration of formulations of the prior art.
- AUC Area Under the Curve
- the term “absorption rate to reach Cmax” means the slope of the PK curve between the administration of a formulation containing drug until Cmax, or the slope of the PK curve between a trough and the adjacent peak following serial multiple dose administrations of the formulation.
- the formulations of the present application unexpectedly have a markedly different PK profile compared to prior art formulations containing a PDE-4 inhibitor.
- the formulations of the present application provide a sufficiently high AUC to attain a systemically effective level of the PDE-4 inhibitor without producing a spike in Cmax.
- the gradual ascent to Cmax obtained following topical application of the formulations of the present invention is markedly different from that of prior art formulations, but the AUC is similar.
- the PK profile lacks the initial Cmax spike and the peak to trough pattern that is obtained following multiple daily dosing with prior art formulations containing the drug.
- the formulations of the present invention can result in higher systemic exposure levels (AUC) than are possible with prior art formulations and without the side effects associated with Cmax spike, such as those of the G.I. system. Such previously unobtainable exposure levels will provide a greater efficacy in the treatment of diseases.
- AUC systemic exposure levels
- the PK profile obtained after multiple doses of the formulation of the present application is extremely and unexpectedly flat and prolonged with an extremely small peak to trough fluctuation following administration for 28 days. This flatness of the PK profile is especially pronounced when the formulation further contains diethylene glycol monoethyl ether.
- the absorption of the PDE-4 inhibitor from the formulation in an amount required to provide a therapeutic effect is not dependent on a spike in absorption to provide a high Cmax and because the absorption of the PDE-4 inhibitor is stable and has a flat PK profile, an individual user of the formulation may miss a dose from time to time and still maintain efficacy of the treatment.
- An important advantage of the formulations of the present invention is that, because the ascent to Cmax is so slow, and the Cmax spike is avoided, the formulations of the present invention permit the obtaining of higher systemic exposure levels (AUC) than are possible with prior art formulations and without the side effects associated with Cmax spike, such as those of the G.I. system. Such previously unobtainable exposure levels will provide a greater efficacy in the treatment of diseases.
- AUC systemic exposure levels
- the present invention is a pharmaceutical formulation for administering a PDE-4 inhibitor drug to an individual in need thereof.
- the pharmaceutical formulation of the present invention contains one or more PDE-4 inhibitor drugs.
- PDE-4 inhibitor drugs may include apremilast, cilomilast, crisaborole, ibudilast, piclamilast, roflumilast, and/or rolipram.
- the formulation contains roflumilast.
- concentration of the PDE-4 inhibitor drug is that which is sufficient to ameliorate a medical condition that is responsive to the administration of a PDE-4 inhibitor drug, such as psoriatic arthritis, psoriasis, atopic dermatitis, asthma and COPD.
- the formulation further contains one or more phosphate ester surfactants.
- phosphate ester surfactants that may be included in the formulations of this application include but are not limited to potassium cetyl phosphate, potassium C9-15 alkyl phosphate, potassium C11-15 alkyl phosphate, potassium C12-13 alkyl phosphate, potassium C12-14 alkyl phosphate, potassium lauryl phosphate, C8-10 alkyl ethyl phosphate, C9-15 alkyl phosphate, C20-22 alkyl phosphate, castor oil phosphate, ceteth-10 phosphate, cetheth-20 phosphate, ceteth-8 phosphate, cetearyl phosphate, cetyl phosphate, dimethicone PEG-7 phosphate, disodium lauryl phosphate, disodium oleyl phosphate, lauryl phosphate, myristyl phosphate, octyldecyl phosphate, oleth-10 phosphat
- the formulation can optionally contain, in addition to the one or more phosphate ester surfactants, diethylene glycol monoethyl ether.
- Diethylene glycol monoethyl ether is also known as 2-(2-ethoxyethoxy)ethanol, or as DEGEE, and is marketed under the several tradenames, including TRANSCUTOL® (Gattefosse Corporation, Paramus, N.J.), CARBITOLTM (The Dow Chemical Company, Midland, Mich.), DIOXITOL® (Shell Oil Company, Houston, Tex.), and POLY-SOLV DM (Monument Chemical, Houston, Tex.).
- DEGEE is often added to topical products as a co-solvent to increase solubility of the drug in the formulation. Addition of DEGEE to a topical formulation has also been shown to enhance skin penetration, i.e. increase Cmax, of topically administered pharmaceutical actives. See Javadzadeh et al, Chapter 12 pages 195-205, in Percutaneous Penetration Enhancers Chemical Methods in Penetration Enhancement: Modification of the Stratum Corneum (N. Dragicevic, H. I. Maibach, eds) Springer-Verlag Berlin Heidelberg 2016.
- the concentration of the PDE-4 inhibitor, such as roflumilast, in the formulation is that which is sufficient to obtain a desired systemic pharmacologic effect when the formulation is applied to the skin of an individual. This concentration will necessarily differ based on the particular PDE-4 inhibitor contained within the formulation and the disease or condition to be treated.
- the concentration within the formulation is typically in the range of 0.001 to 25% w/w, with a preferred range between 0.01 to 5%, a more preferred range between 0.05 and 1%, and a most preferred range between 0.1 and 0.5%.
- the concentration of roflumilast in the formulation is between 0.05 and 0.5%, such as 0.05%, 0.15%, 0.3%, and 0.5% w/w.
- the concentration of the phosphate ester surfactant in the formulation is that which is sufficient to produce a stable emulsion having uniform globule size. If desired, lower concentrations of the phosphate ester surfactant may be combined with other emulsifiers to produce a stable emulsion having uniform globule size.
- the phosphate ester surfactant may also increase the solubility of the roflumilast in the cream.
- the concentration of the phosphate ester surfactant generally may be any concentration between 1.0% to 25% w/w. The preferred concentration can be different for different administration forms.
- the concentration of the phosphate ester surfactant is between 2.5% and 20%, with a more preferred concentration range between 5% and 15%, and a most preferred concentration being about 10% w/w.
- the concentration is preferably between 1.0%-10%, more preferably between 1.0%-10%, and most preferably 2%.
- the concentration of the diethylene glycol monoethyl ether, if present, in the formulation is that which is sufficient to dissolve the active pharmaceutical ingredient.
- Diethylene glycol monoethyl ether may also enhance the skin penetration of the roflumilast.
- the concentration of the diethylene glycol monoethyl ether is between 5% and 50% w/w, with a preferred range of concentrations between 10% and 40% w/w, a more preferred range between 15% and 30% w/w, and a particular preferred concentration being about 15-25% w/w.
- water is formulated as about 20-90% (w/w) in topical products. For blends of DEGEE and water the ratio can range from 1:10 to 20:1.
- DEGEE:water ratio is 1:4 to 9:1 in a formulation containing roflumilast.
- DEGEE-water blends can be used to dissolve up to 2.0% roflumilast (in the finished product) or preferably up to 0.5% roflumilast (in the finished product).
- the formulation for topical application to the skin is preferably a semi-solid dosage form that is cosmetically acceptable for use on the skin and which is easily spreadable on the skin.
- semi-solid dosage forms include emulsions, ointments, creams, gels, and pastes.
- the formulation may alternatively be in a form other than a semi-solid dosage form, such as a liquid, which may be administered as a spray, or a foam.
- a formulation for topical administration is in one of the following forms:
- the topical product may be an emulsion comprising a discrete hydrophobic phase and a continuous aqueous phase that includes the DEGEE-water blend and optionally one or more polar hydrophilic excipients as well as solvents, co-solvents, salts, surfactants, emulsifiers, and other components.
- emulsions may include water-soluble or water-swellable polymers that help to stabilize the emulsion.
- a water-in-oil emulsion The compositions may be formulations in which roflumilast is incorporated into an emulsion that includes a continuous hydrophobic phase and an aqueous phase that includes the DEGEE-water blend and optionally one or more polar hydrophilic carrier(s) as well as salts or other components.
- These emulsions may include oil-soluble or oil-swellable polymers as well as one or more emulsifier(s) that help to stabilize the emulsion.
- Roflumilast can be added pre-dissolved in the continuous aqueous phase containing the DEGEE-water blend.
- roflumilast can be pre-dissolved in the hydrophobic discrete phase of the emulsion that is then mixed with the DEGEE-water blend and optional hydrophilic excipients that do not contain the active ingredient.
- Roflumilast can be pre-dissolved in both the oil phase and water phase of the emulsion or added pre-dissolved in DEGEE or a DEGEE-water blend after the emulsion has been formed.
- Some emulsions undergo phase inversion over a specific temperature range during cooling of the emulsion.
- roflumilast may be added to a water-in-oil emulsion above the phase inversion temperature, with the final drug product being an oil-in-water emulsion at controlled room temperature, or vice versa.
- Thickened aqueous gels include the DEGEE-water blend with dissolved roflumilast and optionally one or more polar hydrophilic carrier(s) such as hexylene glycol which has been thickened by suitable natural, modified natural, or synthetic thickeners as described below.
- the thickened aqueous gels can be thickened using suitable polyethoxylate alky chain surfactants or other nonionic, cationic, or anionic systems.
- Thickened hydroalcoholic gels These systems include the DEGEE-water-alcohol blend with dissolved roflumilast and optionally one or more polar hydrophilic carrier(s) such as hexylene glycol as the polar phase which has been thickened by suitable natural, modified natural, or synthetic polymers such as described below.
- the thickened hydroalcoholic gels can be thickened using suitable polyethoxylate alky chain surfactants or other nonionic, cationic, or anionic systems.
- the alcohol can be ethanol, isopropyl alcohol or other pharmaceutically acceptable alcohol.
- a hydrophilic or hydrophobic ointment The compositions are formulated with a hydrophobic base (e.g. petrolatum, thickened or gelled water insoluble oils, and the like) and optionally have a minor amount of the DEGEE-water blend with dissolved roflumilast. Hydrophilic ointments generally contain one or more surfactants or wetting agents.
- a hydrophobic base e.g. petrolatum, thickened or gelled water insoluble oils, and the like
- Hydrophilic ointments generally contain one or more surfactants or wetting agents.
- the formulation may contain additional excipients commonly present in such dosage forms. Such excipients will vary depending on the type of the dosage form and the desired characteristics.
- Compositions of the present invention may include one or more solvents or co-solvents to obtain the desired level of active ingredient solubility in the product.
- the solvent may also modify skin permeation or activity of other excipients contained in a topical product.
- Solvents include but are not limited to acetone, ethanol, benzyl alcohol, butyl alcohol, diethyl sebacate, diethylene glycol monoethyl ether, diisopropyl adipate, dimethyl sulfoxide, ethyl acetate, isopropyl alcohol, isopropyl isostearate, isopropyl myristate, N-methyl pyrrolidinone, propylene glycol and SD alcohol.
- compositions of the present invention may include a moisturizer to increase the level of hydration.
- the moisturizer is often a component of the discrete or continuous hydrophobic phase.
- the moisturizer can be a hydrophilic material including humectants or it can be a hydrophobic material including emollients.
- Suitable moisturizers include but are not limited to:1,2,6-hexanetriol, 2-ethyl-1,6-hexanediol, butylene glycol, glycerin, polyethylene glycol 200-8000, butyl stearate, cetostearyl alcohol, cetyl alcohol, cetyl esters wax, cetyl palmitate, cocoa butter, coconut oil, cyclomethicone, dimethicone, docosanol, ethylhexyl hydroxystearate, fatty acids, glyceryl isostearate, glyceryl laurate, glyceryl monostearate, glyceryl oleate, glyceryl palmitate, glycol distearate, glycol stearate, isostearic acid, isostearyl alcohol, lanolin, mineral oil, light mineral oil, lanolin, limonene, medium-chain triglycerides, menthol, myristyl
- compositions according to the present invention can optionally include one or more surfactants to emulsify the composition and to help wet the surface of the active ingredients or excipients.
- surfactant means an amphiphile (a molecule possessing both polar and nonpolar regions which are covalently bound) capable of reducing the surface tension of water and/or the interfacial tension between water and an immiscible liquid.
- Surfactants include but are not limited to alkyl aryl sodium sulfonate, Amerchol-CAB, ammonium lauryl sulfate, apricot kernel oil PEG-6 esters, Arlacel, benzalkonium chloride, Ceteareth-6, Ceteareth-12, Ceteareth-15, Ceteareth-30, cetearyl alcohol/ceteareth-20, cetearyl ethylhexanoate, ceteth-10, ceteth-10 phosphate, ceteth-2, ceteth-20, ceteth-23, choleth-24, cocamide ether sulfate, cocamine oxide, coco betaine, coco diethanolamide, coco monoethanolamide, coco-caprylate/caprate, dicetyl phosphate, disodium cocoamphodiacetate, disodium laureth sulfosuccinate, disodium lauryl sulfoacetate, disodium lauryl sulfosuccinate, diso
- Suitable phosphate ester surfactants include but are not limited to potassium cetyl phosphate, potassium C9-15 alkyl phosphate, potassium C11-15 alkyl phosphate, potassium C12-13 alkyl phosphate, potassium C12-14 alkyl phosphate, potassium lauryl phosphate, C8-10 alkyl ethyl phosphate, C9-15 alkyl phosphate, C20-22 alkyl phosphate, castor oil phosphate, ceteth-10 phosphate, cetheth-20 phosphate, ceteth-8 phosphate, cetearyl phosphate, cetyl phosphate, dimethicone PEG-7 phosphate, disodium lauryl phosphate, disodium oleyl phosphate, lauryl phosphate, myristyl phosphate, octyldecyl phosphate, oleth-10 phosphate, oleth-5 phosphate, oleth-3 phosphate, oleyl eth
- a topical product that is thickened with soluble, swellable, or insoluble organic polymeric thickeners such as natural and synthetic polymers or inorganic thickeners including but not limited to acrylates copolymer, carbomer 1382, carbomer copolymer type B, carbomer homopolymer type A, carbomer homopolymer type B, carbomer homopolymer type C, caroboxy vinyl copolymer, carboxymethylcellulose, carboxypolymethylene, carrageenan, guar gum, hydroxyethyl cellulose, hydroxypropyl cellulose, microcrystalline wax, and methylcellulose.
- soluble, swellable, or insoluble organic polymeric thickeners such as natural and synthetic polymers or inorganic thickeners including but not limited to acrylates copolymer, carbomer 1382, carbomer copolymer type B, carbomer homopolymer type A, carbomer homopolymer type B, carbomer homopolymer type C, caroboxy vinyl cop
- the formulation may contain one or more thickening agent to provide viscosity so that the formulation may be provided in the form of a semisolid, such as a lotion, gel, cream, or ointment.
- suitable thickening agents include but are not limited to soluble, swellable, or insoluble organic polymeric thickeners such as natural and synthetic polymers or inorganic thickeners including but not limited to acrylates copolymer, carbomer 1382, copolymer type B, carbomer homopolymer type A, homopolymer type B, carbomer homopolymer type C, carboxypolymethylene, carrageenan, guar gum, hydroxyethyl cellulose, hydroxypropyl cellulose, microcrystalline wax, acacia, alginic acid, bentonite, carbomers, also known as carboxy vinyl polymers, such as sold under the tradename Carbopol® (Lubrizol, Wickliffe, Ohio), carboxymethylcellulose, ethylcellulose, gelatin,
- the thickening agent may reside in the oil or lipophilic portion of the formulation.
- suitable lipophilic thickening agents include cetyl alcohol, stearyl alcohol, glyceryl stearate, white beeswax, microcrystalline wax, hydrogenated polyisobutane polymers, and emulsifying wax.
- compositions according to the present invention may be formulated with additional components such as fillers, carriers and excipients conventionally found in cosmetic and pharmaceutical topical products.
- Additional components include but are not limited to foaming agents, propellants, preservatives, antioxidants, sequestering agents, stabilizers, buffers, pH adjusting solutions, skin penetration enhancers, chelating agents, film formers, dyes, pigments, fragrances and other excipients to improve the stability or aesthetics of the product.
- hexylene glycol is added to inhibit changes in particle size distribution over the shelf life of the composition. Hexylene glycol can be added between 0.1% and 20% on a weight/weight basis, preferably between 0.25% and 8% on a weight/weight basis and most preferably between 0.5% and 2% on a weight/weight basis.
- the formulation may contain other pharmaceutically acceptable excipients if desired.
- the formulation may contain a humectant such as glycerin, sorbitol, hexylene glycol, urea, or propylene glycol.
- the formulation may contain an emollient such as petrolatum, lanolin, mineral oil, light mineral oil, stearic acid, cyclomethicone, or dimethicone. Additional optional excipients include stabilizers, foaming agents, preservatives such as methylparaben, pH adjusting agents such as sodium hydroxide, chelating agents such as EDTA and its salts, and buffers.
- the roflumilast is in the form of an aerosolized foam which is particularly suitable for application to the scalp.
- Any suitable propellant can be used to prepare the aerosolized foam.
- Particularly preferred propellants are Isobutane A-31, Aeropin 35, Butane 48, Dimethyl Ether/N-Butane-(53/47), Propane/Iso-Butane/N-Butane, Propane/Isobutane-A70, and Propane/Isobutane A-46, N-Butane (A-17.
- compositions according to the present invention may be formulated with additional active agents depending on the condition to be treated.
- additional active agents include but are not limited to NSAIDs (e.g. Aspirin, Ibuprofen, Ketoprofen, Naproxen), Apremilast, JAK inhibitors (e.g. Tofacitinib, Ruxolitinib, Oclacit), leukotriene inhibitors (e.g. Zileuton, Zafirlukast, Montelukast), mast cell stabilizers (e.g.
- NSAIDs e.g. Aspirin, Ibuprofen, Ketoprofen, Naproxen
- JAK inhibitors e.g. Tofacitinib, Ruxolitinib, Oclacit
- leukotriene inhibitors e.g. Zileuton, Zafirlukast, Montelukast
- mast cell stabilizers e.g.
- Nedocromil Cromolyn sodium, Ketotifen, Pemirolast
- Anthralin dithranol
- Azathioprine Tacrolimus
- Coal tar Methotrexate
- Methoxsalen Salicylic acid
- Ammonium lactate Urea
- Hydroxyurea 5-fluorouracil
- Propylthouracil Propylthouracil
- 6-thioguanine Sulfasalazine
- Mycophenolate mofetil Fumaric acid esters
- Corticosteroids e.g.
- bronchodialators e.g. beta-agonists, anticholinergic
- Suitable pharmaceutical dosage forms include but are not limited to emulsions, suspensions, sprays, oils, ointments, fatty ointments, creams, pastes, gels, foams transdermal patches, and solutions.
- the composition preferably contains roflumilast, salts of roflumilast, the N-oxide of roflumilast or salts thereof in an amount of 0.005-2% w/w, more preferably 0.05-1% w/w, and most preferably 0.1-0.5% w/w per dosage unit.
- the topical formulation containing the PDE-4 inhibitor, such as roflumilast is applied to the skin in an amount that is sufficient to obtain the desired pharmacologic effect, which typically is to ameliorate the signs and/or symptoms of a medical disorder.
- the amount of the formulation that is applied may vary depending on the PDE-4 inhibitor that is contained within the formulation, the concentration of the PDE-4 inhibitor within the formulation, and the frequency in which the formulation is applied. Generally, the formulation is applied with a frequency between weekly to several times daily, preferably between every other day to three times daily, and most preferably one or two times daily.
- the formulation containing the PDE-4 inhibitor may be used in veterinary and in human medicine to treat a systemic medical condition that is ameliorated by or responsive to systemic administration of a PDE-4 inhibitor such as roflumilast.
- a systemic medical condition that is ameliorated by or responsive to systemic administration of a PDE-4 inhibitor such as roflumilast.
- Non-limiting examples of such medical conditions include but are not limited to acute and chronic airway disorders such as bronchitis, allergic bronchitis, asthma, and COPD; proliferative, inflammatory and allergic dermatoses such as psoriasis, scalp psoriasis, or inverse psoriasis, irritant and allergic contact eczema, hand eczema, atopic dermatitis, seborrheic dermatitis, lichen simplex, sunburn, aphthous ulcers, lichen planus, vitiligo, pruritus in the genital or anal
- the formulation for topical application containing the PDE-4 inhibitor, such as roflumilast may be prepared by processes typically used in the field of manufacture of pharmaceutical formulations for topical application.
- a single-phase formulation such as a liquid
- the constituents of the formulation may be combined and mixed until a homogenous solution or suspension of the active ingredient is obtained.
- a multiphase formulation such as an emulsion
- the components of the aqueous phase and of the oil phase may be separately combined and mixed until homogenous solutions are obtained and then the aqueous solution and the oil solution may be combined and mixed, such as by shear mixing, to form the formulation.
- the one or more drug actives may be dissolved (molecularly dispersed), complexed, or associated with an excipient or other active, or may be particulate (amorphous or crystalline).
- the oil phase may be added to the water phase, or the water phase may be added to the oil phase.
- the phases may be combined and mixed, such as at elevated temperatures of 50-90° C. or at room temperature, that is between 20-30° C., or at a temperature between room temperature and the elevated temperatures.
- roflumilast is utilized as a representative example of a PDE-4 inhibitor drug.
- CrodafosTM CES (Croda Inc., Edison, N.J.), containing the phosphate ester surfactants dicetyl phosphate and ceteth-10 phosphate, is utilized as a representative example of a phosphate ester surfactant.
- a first formulation of the invention hereafter referred to as Formulation 1, was made by combining roflumilast with a phosphate ester surfactant and water. The formulation was buffered with NaOH to obtain a pH of 6.5.
- a second formulation of the invention hereafter referred to as Formulation 2, was made by combining the above constituents and adding diethylene glycol monoethyl ether. This formulation was buffered with NaOH to obtain a pH of 6.5.
- Comparative Formulation 3 A formulation that is not of the invention, hereafter referred to as Comparative Formulation 3, was made by combining roflumilast with diethylene glycol monoethyl ether. This formulation was gelled with hydroxylpropyl cellulose so that it would have a similar viscosity and spread on the skin like the two phosphate ester surfactant emulsion Formulations 1, and 2. This semisolid formulation was likewise buffered with NaOH to obtain a pH of 6.5.
- compositions of these formulations are shown below in table 1.
- Example 2 Single Dose Testing of Formulations of Example 1
- pigs dosed with Comparative Formulation 3 of the prior art showed a rapid spike to Cmax within 3 hours of dosing.
- Formulation 1 of the invention containing the phosphate ester surfactant Crodafos CES showed little or no spike to Cmax.
- Pigs dosed with Formulation 2 of the invention containing both a phosphate ester surfactant and diethylene glycol monoethyl ether, like those dosed with Formulation 1, showed a reduced spike to Cmax as compared to Formulation 3.
- the higher Cmax obtained with Formulation 2 was higher than that for Formulation 1.
- the PK data results in the graph of FIG. 1 show that the single dose PK profile data for the formulation containing phosphate ester surfactants lacks a significant spike to Cmax and has a low Cmax of 0.36 ng/mL, while maintaining a mean plasma concentration of 0.34 ng/ml through the 4 hour sample point. This is in contrast to PK data for the DEGEE formulation that rapidly raises to a Cmax of 0.85 ng/ml at 2 hours and then just as quickly drops to 0.57 ng/mL at 4 hours.
- the phosphate ester surfactant When the phosphate ester surfactant is added to DEGEE the formulation of the invention, it lacks a significant spike to Cmax and has a low Cmax, while maintaining AUC, in contrast to PK data for the DEGEE formulation which does not contain phosphate ester surfactants.
- This PK data is especially surprising in view of the fact that the prior art (Bolle) teaches that Cmax and AUC are similar for topical preparations containing roflumilast, irrespective of the composition of the topical formulation.
- Formulation 1, containing phosphate ester surfactant lacks a significant spike to Cmax.
- a third embodiment of the invention hereafter referred to as Formulation 4, was made by combining roflumilast at a concentration of 0.3% w/w with a phosphate ester surfactant and water.
- the formulation was buffered with NaOH to obtain a pH of 5.5.
- This formulation is similar to Formulation 1 except that the concentration of roflumilast is 0.3% rather than 0.15% and the emulsion is buffered to a pH value of 5.5 rather than a pH value of 6.5.
- Comparative Formulation 5 A formulation that is not of the invention, hereafter referred to as Comparative Formulation 5, was made by combining roflumilast at a concentration of 0.3% containing a phosphate ester surfactant, a polyoxyl stearyl ether surfactant and diethylene glycol monoethyl ether, as well as other excipients.
- This formulation is a cream formulation containing a frequently used phosphate ester surfactant that is not Crodafos CES.
- Comparative Formulation 6 A formulation that is not of the invention, hereafter referred to as Comparative Formulation 6, was made by combining roflumilast at a concentration of 0.2%. This formulation is that of the closest prior art known to the inventors and is disclosed in Example 3 of Bolle et al, U.S. Patent Application No. US 2006/0084684.
- compositions of these formulations are shown below in Table 2.
- Crodafos CES ad pH 5.5 q.s. ad pH 5.5 — Purified Water, USP q.s. ad 100% q.s. ad 100% q.s. ad 100% *The exact ratio of cetostearyl alcohol to dicetyl phosphate to cetheth-10 phosphate in Crodafos CES is consistent between batches of product but is not publicly disclosed by the manufacturer (Croda).
- the safety data sheet for Crodafos CES states that this emulsifier is composed of 60-80% cetostearyl alcohol, 10-20% dicetyl phosphate and 10-20% cetheth-10 phosphate.
- Medium-Chain Triglycerides is the nomenclature used by the US Food and Drug Administration to describe the cosmetic ingredient Capryli/Capric Triglyceride which is sold using tradenames including Miglyol ® 812 and Crodamol ® GTCC.
- Example 4 14-Day Dose Testing of Formulations of Example 3
- Male and female swine (Gottingen Minipig® breed) are ordered to weigh 8 to 12 kg at arrival. On the day prior to administration of one of the topical cream semisolid formulations of Example 3, the hair is clipped from the back of each animal. The pigs are sedated for the shaving procedure. Care is taken to avoid abrading the skin.
- pigs dosed with Formulation 5 of the prior art show a rapid spike to a Cmax value of 6.6 ng/mL at 1 hour after the 14 th consecutive daily dose.
- Formulation 4 of the invention containing the phosphate ester surfactant Crodafos CES show little or no spike to Cmax.
- a fourth formulation of the invention is shown in Table 3, hereafter referred to as Formulation 7, was made by combining the above constituents and adding diethylene glycol monoethyl ether, as well as other ingredients to create a complete formulation.
- This formulation was buffered with NaOH to obtain a pH of 5.5.
- the qualitative and quantitative composition of Formulation 7 varies only in the amount of roflumilast added to the cream. As a fraction of 1% roflumilast is added, a fraction of 1% of water is removed from the cream.
- mice Male and female swine (Gottingen Minipig® breed) were ordered to weigh 8 to 12 kg at arrival. On the day prior to administration of a topical cream containing roflumilast, the hair was clipped from the back of each animal. The pigs were sedated for the shaving procedure. Care was taken to avoid abrading the skin.
- ARQ-151 is a topical cream which contains roflumilast. This phase 1/2a clinical trial enrolled two cohorts: Cohort 1 evaluated a single administration of ARQ-151 cream 0.5% and Cohort 2 evaluated ARQ-151 cream 0.5% or 0.15% applied once daily for 28 days. In Cohort 1, subjects applied ARQ-151 cream 0.5% to 25 cm 2 of psoriatic plaque(s). Subjects were screened (Visit 1), returned to the clinic for treatment (Visit 2) and PK blood draws, had a follow-up visit at 24 hours after the baseline visit for a PK blood draw (Visit 3), and received a follow-up telephone contact for safety evaluation 7 days after Visit 3. Subjects enrolled in Cohort 1 could be enrolled in Cohort 2 if they met eligibility criteria; subjects from Cohort 1 who rolled into Cohort 2 had all of their plaque(s) treated in Cohort 2 up to 5% body surface area (BSA).
- BSA body surface area
- Cohort 2 used a parallel-group, double-blind, vehicle-controlled study design. Subjects were randomly assigned in a 1:1:1 ratio to ARQ-151 cream 0.5%, ARQ-151 cream 0.15%, or a matched vehicle, which was applied to all psoriatic plaques (except on the face, intertriginous areas, scalp, palms, and soles) up to an application area of 5% BSA. Subjects in Cohort 2 had screening and baseline visits, follow-up visits at weeks 1, 2, 3, and 4, an additional visit at day 29 for a final pharmacokinetic sample collection, and a follow-up telephone call for safety evaluation at week 5.
- Cohort 1 received open-label treatment, without assignment or blinding. Assignment to treatment arm in Cohort 2 was performed using a computer-generated randomization list. Randomization was generated using SAS by an unblinded Premier Research statistician who was otherwise not involved in study conduct. The block size was 3; 72 total blocks were used. everyone was blinded to treatment.
- a target amount of 480 grams sterile water for irrigation-USP was accurately weighed into a 1000 ml glass beaker and 20 grams of sodium hydroxide pellets-NF was added and mixed using a stir bar until complete dissolution. This solution was set aside and labeled 1 N Sodium Hydroxide.
- Target weights pf 1,000 grams white petrolatum-USP, 500 grams isopropyl palmitate-NF, and 1,000 grams of phosphate-ester self-emulsifying wax (CRODAFOSTM CES) were weighed into a 4 L glass beaker and heated on a hot plate to 75° C. to 80° C. while mixing with a propeller mixer. The mixture was labeled Oil Phase and was maintained at 75° C. to 80° C.
- a target weight of 4,225 grams of sterile water for irrigation-USP and a target weight 300 grams 1N sodium hydroxide were added and heated on a hot plate to 75° C. to 80° C. This was recorded as the Aqueous Phase and was maintained at 75° C. to 80° C.
- Target weights of 2,400 grams of Transcutol P-NF, 200 grams of hexylene glycol-NF, 20.0 grams of methylparaben-NF, and 5.0 grams of propylparaben NF were accurately weighed into a 7 L stainless steel beaker and propeller mixed until a clear homogeneous solution was obtained. Sufficient potency corrected roflumilast was added to this solution to obtain either a 0.15% roflumilast cream or a 0.5% roflumilast cream and this was labeled the API Phase.
- the Oil Phase that was maintained at 75° C. to 80° C. was slowly added to the Aqueous Phase maintained at 75° C. to 80° C. in the Main Manufacturing Vessel with homogenizer mixing until a smooth, homogeneous cream was obtained.
- the API Phase was slowly added to the cream in the main manufacturing vessel and was mixed with the homogenizer.
- the pH of the finished cream was measured and adjusted to within the pH range of 5.1 to 5.9 using 1 N Sodium Hydroxide or Diluted Hydrochloric Acid, 10% (w/v)-NF.
- the cream was filled into aluminum 3 ⁇ 4′′ ⁇ 33 ⁇ 4′′ #16 sealed white tubes and the tubes crimped to provide the primary container closure system.
- TPSS Target Plaque Severity Score
- non-plaque forms of psoriasis non-plaque forms of psoriasis, drug-induced psoriasis, skin conditions that would interfere with study assessments, known allergies to excipients in ARQ-151 cream, hypersensitivity to PDE-4 inhibitors, inability to discontinue use of strong P-450 cytochrome inducers or P-450 cytochrome inhibitors, inability to refrain from use of a tanning bed, inability to discontinue systemic or topical therapies for the treatment of psoriasis, active infection requiring oral or intravenous antibiotics, antifungal, or antiviral agents within 7 days of baseline, or current or history of cancer within 5 years except for fully excised skin basal cell carcinoma, cutaneous squamous cell carcinoma, or cervical carcinoma.
- Formulation 7 also known as ARQ-151 cream, contained 0.5% or 0.15% roflumilast. Vehicle contained all ingredients in the ARQ-151 cream except roflumilast.
- ARQ-151 cream 0.5% was applied in the clinic to 25 cm 2 of psoriatic plaque(s).
- all psoriatic lesions up to 5% BSA were treated at home by subjects. Subjects were instructed by study staff on proper dosing and administration of ARQ-151 cream and vehicle.
- TPSS Target Plaque Severity Score
- TPA Target Plaque Area
- TPSS ⁇ TPA was roughly analogous to a PASI for the treated plaque.
- TPSS and TPA assessments were conducted at screening, baseline, and weeks 1, 2, 3, and 4.
- Optional photography was performed at 4 centers at baseline and Visits 2, 3, 4, and 6.
- roflumilast and its active metabolite roflumilast N-oxide12 were determined from plasma. Blood samples for pharmacokinetic analyses were collected on day 1 at 1, 2, 4, and 6 hours after ARQ-151 application. On day 28, samples were collected before dosing (trough level) and at 1, 2, 4, 6, and 24 hours after application.
- Safety endpoints included the type and incidence of treatment-emergent adverse events (TEAEs) and serious adverse events (SAEs); application site reactions; and changes in physical examinations, vital signs, electrocardiograms, and clinical laboratory parameters. Safety was assessed at all study visits and at telephone follow-up. Skin irritation was assessed on days 1 and 2 for Cohort 1 and at baseline and visits 3, 4, 5, and 6 for Cohort 2. Skin irritation was evaluated using a scale developed by Berger and Bowman13 ranging from 0 (no evidence of irritation) to 7 (strong reaction spreading beyond application site). Additionally, other clinical signs of irritation were scored on an ‘A’ (slight glazed appearance) to ‘F’ (small petechial erosions and/or scabs) scale.
- TEAEs treatment-emergent adverse events
- SAEs serious adverse events
- Depressive Symptomatology Questionnaire 14 which was administered at screening, week 2, and week 4.
- the questionnaire is a 16-item inventory of depressive symptoms, with each item scored on a range of 0 to 3. Depression severity is based on score category, where total score 5 represents no depression; 6-10 represents mild depression; 11-15 represents moderate depression; 16-20 represents severe depression; and 21 represents very severe depression.
- TEAEs were coded using the Medical Dictionary for Regulatory Activities (MedDRA) version 20.1, and severity was graded on a 5-point scale of Grade 1 (mild), Grade 2 (moderate), Grade 3 (severe), Grade 4 (life-threatening consequences), or Grade 5 (death related to AE).
- MedDRA Medical Dictionary for Regulatory Activities
- Pharmacokinetic parameters were calculated using the plasma concentration values of roflumilast and roflumilast N-oxide (ng/mL) at each nominal time point with Phoenix WinNonlin (v8.0) using standard noncompartmental analysis.
- the area under the concentration time curve (AUC) was estimated using the linear trapezoidal linear interpolation method.
- the maximum plasma concentration (Cmax) and time to reach maximum concentration (Tmax) were based on direct assessment. Sample concentration values reported to be below the limit of quantification (BLQ; ⁇ 0.100 ng/mL) were ignored.
- the primary efficacy endpoint was the difference in mean percentage change from baseline at week 4 in the product of TPSS ⁇ TPA between each dose of ARQ-151 cream and vehicle control.
- the primary efficacy endpoint was analyzed using a mixed model for repeated measures with center within country, treatment, study visit, and treatment-by-study-visit interaction as fixed effects and baseline TPSS ⁇ TPA score as a covariate. Mean differences between visit value and baseline were calculated for each treatment. Mean percentage change from baseline for each ARQ-151 dose and corresponding vehicle were compared using an unstructured covariance structure unless the model did not converge; in that case the appropriate covariance structure was investigated.
- Secondary efficacy endpoints included the difference in mean percentage change from baseline at weeks 1, 2, and 3 in composite TPSS ⁇ TPA score, TPSS, and TPA between each dose of ARQ-151 cream and vehicle control.
- Safety analyses were conducted with the safety population, which comprised all subjects who received at least 1 dose of study drug and were based on treatment received.
- Pharmacokinetic analyses were conducted with the pharmacokinetic population, which included all subjects who consented for sampling and received active drug with sufficient plasma concentrations of roflumilast to define a profile.
- Efficacy analyses were conducted with the modified intent-to-treat population, which was composed of all subjects in Cohort 2 who received 1 dose of study drug and had 1 post-baseline efficacy evaluation.
- the mean age (standard deviation [SD]) was 51.6 (16.9) years for Cohort 1 and mean age ranged from 47.5 to 55.3 years across Cohort 2 treatment arms (Table 5). Most subjects were white. The average BSA of involvement was ⁇ 2% in all treatment groups. Of the 89 subjects enrolled in Cohort 2, 35 (39.3%) had target plaques located on the knees, elbows, or both.
- Formulation 7 (ARQ-151 cream) 0.5% and 0.15% was well tolerated, safe, and effective for the treatment of chronic plaque psoriasis.
- Formulation 7 (ARQ-151 cream) at both doses tested demonstrated strong efficacy as shown by statistically significant reductions in plaque severity and size compared to vehicle.
- the TPSS ⁇ TPA endpoint was chosen to be analogous to whole-body Psoriasis Area and Severity Index (PASI) measurements. Both use the same plaque severity scale, which was applied to 1-3 target lesions in the current study vs the entire body with PASI.
- the TPA ‘area’ function is different from the area of plaque involvement assessment in PASI, but we would propose that the product of TPSS ⁇ TPA provides an analogous assessment of ‘target plaque(s)’ to PASI for the entire body.
- Formulation 7 (ARQ-151 cream) at both 0.5% and 0.15% was similar to vehicle, which is explained, at least in part, by the pharmacokinetic findings.
- roflumilast When administered orally for COPD, roflumilast may be associated with gastrointestinal side effects (diarrhea, nausea), headache, and weight loss in a minority of patients.
- gastrointestinal side effects diarrhea, nausea
- headache headache
- weight loss in a minority of patients.
- clinical development of PDE-4 inhibitors for oral use has been limited by gastrointestinal effects such as nausea and vomiting. Indeed, nausea, vomiting, and weight loss are believed to be mediated at the level of the brain.
- PDE-4 inhibition represents a validated mechanism of action for oral psoriasis therapy, but a new mechanism of action for topical psoriasis therapy.
- Patients with mild to moderate disease represent the majority of the psoriasis population. This patient population has not benefited from the recent introduction of biologic therapies, which are used in patients with more severe disease.
- PDE-4 inhibition is an effective modality for the treatment of psoriasis. Apremilast was approved for the oral treatment of psoriasis in 2014. Crisaborole is currently approved at a 2% concentration for the treatment of atopic dermatitis.
- Roflumilast is a highly potent PDE-4 inhibitor, exhibiting half maximal inhibitory concentration (IC 50 ) values of both roflumilast and roflumilast N-oxide for the different PDE-4 isoforms and subtypes at subnanomolar potency.
- Rolumilast is 50- to 300-fold more potent than either apremilast or crisaborole against the different PDE-4 isoforms and subtypes.
- the oral dose of roflumilast at only 0.5 mg per day, is reflective of this extremely high potency.
- a PDE4 inhibitor is formulated as a topical ointment composed of white petrolatum, propylene glycol, mono- and diglycerides, paraffin, butylated hydroxytoluene and edetate calcium disodium. This formulation does not contain a phosphate ester surfactant.
- steady-state pharmacokinetic data for crisaborole were obtained on day 8 after once daily treatment with Eucrisa®. This steady state pharmacokinetic data was obtained from the Eucrisa® SBOA and is reproduced in FIG. 9 .
- the PDE4 inhibitor crisaborole when dosed from a commercialized topical ointment, rapidly rises to a Cmax spike at 4 hours and then drops to near pre-dose levels within 24-hours of once daily dosing.
- This high Cmax spike of the PDE4 inhibitor occurs after a single topical application and after steady-state dosing of once daily ointment applications.
- Example 8 Single Dose Pharmacokinetics of Crisaborole Delivered from a Crodafos CES Cream Compared to Delivery of Roflumilast from the Same Cream
- Crisaborole (0.3% w/w) was formulated as cream Formulation 8 by combining Crodafos CES (a commercial blend of cetostearyl alcohol, dicetyl phosphate and ceteth-10 phosphate), diethylene glycol monoethyl ether, as well as other ingredients to create a complete marketable formulation.
- Formulation 8 has the same excipients in the same ratios as Formulation 7 of this invention. The only difference between the two formulations is that Formulation 8 contains 0.3% crisaborole as the PDE-4 inhibitor drug active and Formulation 7 contains 0.3% roflumilast as the PDE-4 inhibitor drug active. Both formulations were buffered with NaOH to obtain a pH of 5.5.
- Formulation 8 PDE4 Inhibitor 0.3% 0.3% w/w Roflumilast Crisaborole Petrolatum, USP 10.0% w/w 10.0% w/w Isopropyl Palmitate, NF 5.0% w/w 5.0% w/w Crodafos CES 10.0% w/w 10.0% w/w cetostearyl alcohol (6-8% w/w) (6-8% w/w) dicetyl phosphate (1-2% w/w) (1-2% w/w) ceteth-10 phosphate (1-2% w/w) (1-2% w/w) (1-2% w/w) Diethylene Glycol Monoethyl Ether, 25.0% w/w 25.0% w/w NF Hexylene Glycol, NF 2.0% w/w 2.0% w/w Methylparaben, NF 0.20% w/w 0.20% w/w Propylparaben, NF 0.050%
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CN202080075942.XA CN114630666A (zh) | 2018-11-16 | 2020-04-20 | 减少施用磷酸二酯酶-4抑制剂的副作用的方法 |
CA3150222A CA3150222A1 (en) | 2018-11-16 | 2020-04-20 | METHOD FOR REDUCING SIDE EFFECTS ARISING FROM ADMINISTRATION OF PHOSPHODIESTERASE-4 INHIBITORS |
PCT/US2020/029008 WO2021045804A1 (en) | 2018-11-16 | 2020-04-20 | Method for reducing side effects from administration of phosphodiesterase-4 inhibitors |
EP20861685.4A EP4025214A4 (en) | 2018-11-16 | 2020-04-20 | METHOD OF REDUCING SIDE EFFECTS OF ADMINISTRATION OF PHOSPHODIESTERASE-4 INHIBITORS |
JP2022514975A JP2022547121A (ja) | 2018-11-16 | 2020-04-20 | ホスホジエステラーゼ-4阻害剤の投与からの副作用を低減するための方法 |
US17/327,236 US11992480B2 (en) | 2018-11-16 | 2021-05-21 | Method for reducing side effects from administration of phosphodiesterase-4 inhibitors |
US18/353,870 US20240024300A1 (en) | 2018-11-16 | 2023-07-17 | Method for reducing side effects from administration of phosphodiesterase-4 inhibitors |
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CN (1) | CN114630666A (ja) |
CA (1) | CA3150222A1 (ja) |
WO (1) | WO2021045804A1 (ja) |
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WO2021045804A1 (en) * | 2018-11-16 | 2021-03-11 | Arcutis, Inc. | Method for reducing side effects from administration of phosphodiesterase-4 inhibitors |
US20210236416A1 (en) * | 2020-02-03 | 2021-08-05 | Sol-Gel Technologies Ltd. | Treatment of skin disorders with topical roflumilast combination compositions |
WO2022044005A1 (en) * | 2020-08-25 | 2022-03-03 | Sol-Gel Technologies Ltd. | Topical roflumilast compositions and uses thereof |
WO2022169615A1 (en) * | 2021-02-05 | 2022-08-11 | Arcutis Biotherapeutics, Inc. | Roflumilast formulations with an improved pharmacokinetic profile |
WO2022259252A1 (en) * | 2021-06-08 | 2022-12-15 | Sol-Gel Technologies Ltd. | Methods of reducing acne and rosacea relapse rate and severity |
US20230190651A1 (en) * | 2021-12-17 | 2023-06-22 | Arcutis Biotherapeutics, Inc. | Topical Aerosol Foams |
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US11793796B2 (en) | 2017-06-07 | 2023-10-24 | Arcutis Biotherapeutics, Inc. | Inhibition of crystal growth of roflumilast |
US11819496B2 (en) | 2017-06-07 | 2023-11-21 | Arcutis Biotherapeutics, Inc. | Topical roflumilast formulation having improved delivery and plasma half-life |
CN117224482A (zh) * | 2023-09-07 | 2023-12-15 | 苏州易合医药有限公司 | 一种用于治疗ipf疾病的吸入制剂及其制备方法 |
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MX2022009399A (es) * | 2020-01-31 | 2022-09-19 | Arcutis Biotherapeutics Inc | Formulacion topica de roflumilast que tiene mayor liberacion y semivida plasmatica. |
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2019
- 2019-09-06 US US16/563,435 patent/US20200155524A1/en not_active Abandoned
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2020
- 2020-04-20 JP JP2022514975A patent/JP2022547121A/ja active Pending
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- 2020-04-20 CN CN202080075942.XA patent/CN114630666A/zh active Pending
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- 2021-05-21 US US17/327,236 patent/US11992480B2/en active Active
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US11793796B2 (en) | 2017-06-07 | 2023-10-24 | Arcutis Biotherapeutics, Inc. | Inhibition of crystal growth of roflumilast |
US11819496B2 (en) | 2017-06-07 | 2023-11-21 | Arcutis Biotherapeutics, Inc. | Topical roflumilast formulation having improved delivery and plasma half-life |
WO2021045804A1 (en) * | 2018-11-16 | 2021-03-11 | Arcutis, Inc. | Method for reducing side effects from administration of phosphodiesterase-4 inhibitors |
US11992480B2 (en) | 2018-11-16 | 2024-05-28 | Arcutis Biotherapeutics, Inc. | Method for reducing side effects from administration of phosphodiesterase-4 inhibitors |
US20210236416A1 (en) * | 2020-02-03 | 2021-08-05 | Sol-Gel Technologies Ltd. | Treatment of skin disorders with topical roflumilast combination compositions |
WO2022044005A1 (en) * | 2020-08-25 | 2022-03-03 | Sol-Gel Technologies Ltd. | Topical roflumilast compositions and uses thereof |
WO2022169615A1 (en) * | 2021-02-05 | 2022-08-11 | Arcutis Biotherapeutics, Inc. | Roflumilast formulations with an improved pharmacokinetic profile |
WO2022259252A1 (en) * | 2021-06-08 | 2022-12-15 | Sol-Gel Technologies Ltd. | Methods of reducing acne and rosacea relapse rate and severity |
US20230190651A1 (en) * | 2021-12-17 | 2023-06-22 | Arcutis Biotherapeutics, Inc. | Topical Aerosol Foams |
US20230201177A1 (en) * | 2021-12-28 | 2023-06-29 | Arcutis Biotherapeutics, Inc. | Topical Roflumilast Aerosol Foams |
WO2023129892A1 (en) * | 2021-12-28 | 2023-07-06 | Arcutis Biotherapeutics, Inc. | Topical aerosol foams |
CN117224482A (zh) * | 2023-09-07 | 2023-12-15 | 苏州易合医药有限公司 | 一种用于治疗ipf疾病的吸入制剂及其制备方法 |
Also Published As
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CN114630666A (zh) | 2022-06-14 |
JP2022547121A (ja) | 2022-11-10 |
EP4025214A1 (en) | 2022-07-13 |
US20210275509A1 (en) | 2021-09-09 |
US11992480B2 (en) | 2024-05-28 |
EP4025214A4 (en) | 2023-08-30 |
WO2021045804A1 (en) | 2021-03-11 |
CA3150222A1 (en) | 2021-03-11 |
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