Classifications

• • 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
  • A61K9/107—Emulsions ; Emulsion preconcentrates; Micelles
• • 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
  • A61K31/4427—Non condensed pyridines; Hydrogenated derivatives thereof containing further heterocyclic ring systems
  • A61K31/4436—Non condensed pyridines; Hydrogenated derivatives thereof containing further heterocyclic ring systems containing a heterocyclic ring having sulfur as a ring hetero atom
• • 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
  • A61K47/14—Esters of carboxylic acids, e.g. fatty acid monoglycerides, medium-chain triglycerides, parabens or PEG fatty acid esters
• • 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
  • A61K47/30—Macromolecular organic or inorganic compounds, e.g. inorganic polyphosphates
  • A61K47/32—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. carbomers, poly(meth)acrylates, or polyvinyl pyrrolidone
• • 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
  • A61K47/30—Macromolecular organic or inorganic compounds, e.g. inorganic polyphosphates
  • A61K47/34—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyesters, polyamino acids, polysiloxanes, polyphosphazines, copolymers of polyalkylene glycol or poloxamers
• • 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
  • A61K47/44—Oils, fats or waxes according to two or more groups of A61K47/02-A61K47/42; Natural or modified natural oils, fats or waxes, e.g. castor oil, polyethoxylated castor oil, montan wax, lignite, shellac, rosin, beeswax or lanolin
• • 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
  • A61K9/0012—Galenical forms characterised by the site of application
  • A61K9/0014—Skin, i.e. galenical aspects of topical compositions
• • 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
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P17/00—Drugs for dermatological disorders
  • A61P17/10—Anti-acne agents

Definitions

• the present invention relates to topical compositions and methods for treating skin diseases such as acne and psoriasis.
• this invention relates to topical pharmaceutical compositions comprising tazarotene or a pharmaceutically acceptable tazarotenic acid salt, in an oil-in-water emulsion vehicle, for treating skin diseases.
• retinoid tazarotene has been commercially available and has been used to treat acne and psoriasis topically.
• tazarotene may cause significant local skin irritation, especially early in the first through fourth weeks of therapy, thus limiting its use for a prolonged period because many patients stop treatment due to skin irritation.
• the present invention provides topical compositions and methods for treating skin diseases such as acne and psoriasis.
• this invention provides a topical pharmaceutical composition for treating skin diseases, including acne and psoriasis, comprising: tazarotene or a pharmaceutically acceptable tazarotenic acid salt present in the composition at a positive concentration of less than 0.050 percent by weight of the composition; and a dermatologically acceptable oil-in-water emulsion vehicle.
• this invention provides a method of treating skin diseases, including acne and psoriasis, comprising topically applying a skin diseases, including acne and psoriasis, comprising topically applying a skin diseases, including acne and psoriasis, comprising topically applying a skin diseases, including acne and psoriasis, comprising topically applying a skin diseases, including acne and psoriasis, comprising topically applying a
• composition to an affected area of a body of a subject suffering from the skin disease, wherein the composition comprises: tazarotene or a
• composition at a positive concentration of less than 0.050 percent by weight of the composition; and a dermatologically acceptable oil-in-water emulsion vehicle.
• the topical pharmaceutical composition may comprise tazarotene or the salt thereof at 0.01 to 0.049 percent by weight of the composition, or at about 0.045 percent by weight of the composition.
• the tazarotene or tazarotenic acid salt may be dissolved in a liquid oil component of the emulsion.
• the topical pharmaceutical composition may contain the tazarotene or the tazarotenic acid salt as a sole active
• the oil phase of the emulsion may comprise a liquid oil component comprising a DCAE, a MCAE, or combinations thereof.
• the oil phase includes diethyl sebacate as the DCAE.
• the aqueous phase of the emulsion may comprise water and a carbomer homopolymer.
• the topical pharmaceutical composition may comprise: an aqueous phase comprising water, a carbomer homopolymer, and a polymeric emulsifier; an oil phase comprising at least one member selected from the group consisting of a dicarboxylic acid ester and a mineral oil, and the tazarotene or the tazarotenic acid salt.
• the aqueous phase may further comprise a humectant or a preservative, such as at least one member selected from the group consisting of methylparaben, propylparaben and sorbitol.
• the topical pharmaceutical composition may have the form of a lotion, or of a cream.
• the topical pharmaceutical composition may have a pH of about 4 to about 6.
• the step of applying may be carried out once per day for at least eight weeks. According to one aspect, the applying is carried out once per day for at least twelve weeks. [0015] According to other aspects, the composition may be applied is to an affected area of a body of a subject suffering from acne vulgaris in order to treat that condition.
• Figure 1 is a graph of EGSS by visit.
• Figure 2 is a graph of change in inflammatory lesions from baseline.
• Figure 3 is a graph of change in non-inflammatory lesions from baseline.
• Figure 4 are graphs of cutaneous tolerability.
• Figure 5 includes graphs of cutaneous safety. DETAILED DESCRIPTION OF THE INVENTION
• the present invention provides topical compositions and methods for treating skin diseases, including acne and psoriasis.
• the topical pharmaceutical composition comprises tazarotene, or a pharmaceutically acceptable salt of tazarotenic acid, at a concentration below that which is presently utilized in topical formulations.
• tazarotene or the tazarotenic acid salt is included in a composition at a positive concentration less than 0.05 wt%.
• tazarotene or the tazarotenic acid salt is present in the composition at a positive concentration of less than 0.05% based on the weight of the composition.
• this component is present in the range from about 0.01 to about 0.049 wt%, or from about 0.01 to about 0.045 wt%, or from about 0.02 to about 0.045 wt%, or from about 0.03 to about 0.045 wt%, or at about 0.045 wt%.
• concentrations of this component may be 0.01 wt%, 0.015 wt%, 0.02 wt%, 0.025 wt%, 0.03 wt% 0.035 wt%, 0.04 wt%, and 0.045 wt%.
• the topical pharmaceutical composition comprises an oil- in-water emulsion as a carrier vehicle, in which an internal oil phase is dispersed in a continuous aqueous phase.
• the emulsion may be a macroemulsion, a
• composition may have the dosage form of gel, lotion, or cream, or ointment, or liquid, or oil, or spray or foam.
• composition of the present invention may comprise one or more dermatologically acceptable
• excipients such as liquid oils, waxes viscosity-modifying agents, thickening agents, gelling agents, alcohols, surfactants, chelating agents, buffers, preservatives, humectants, emollients, stabilizers, diluents, dispersing agents, emulsifiers, wetting agents, stabilizers, pH adjusters, solvents or cosolvents.
• the composition of the invention may desirably contain a thickening agent to provide viscosity so that the formulation may be provided in the form of a gel, lotion, cream, or ointment.
• the thickening agent may be miscible or soluble in an aqueous fluid.
• suitable thickening agents include acacia, alginic acid and its salts, hyaluronic acid and its salts, carbomers (also known as carboxy vinyl polymers, which are cross-linked polyacrylic acid), carboxymethylcellulose, ethylcellulose, gelatin, hydroxyethyl cellulose,
• the thickening agent may also 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.
• a suitable group of thickening agents is carbomers, such as Carbopol ® and polycarbophil (The Lubrizol Corporation, Wickliffe, Ohio).
• Carbopol ® is a suitable group of thickening agents.
• homopolymers are polymers of acrylic acid crosslinked with allyl sucrose or allylpentaerythritol.
• Carbopol ® copolymers are polymers of acrylic acid and C10-C30 alkyl acrylate crosslinked with allylpentaerythritol.
• Carbopol ® interpolymers are carbomer homopolymers or copolymers that contain a block copolymer of polyethylene glycol and a long chain alkyl acid ester.
• Noveon ® polycarbophil is a polymer of acrylic acid crosslinked with divinyl glycol.
• a surfactant or emulsifier is optionally included, if desired or required.
• Pharmaceutically acceptable anionic, cationic, or non-ionic surfactants may be included in a composition of the present invention. Non-ionic surfactants are preferred.
• Non-limiting examples of non-ionic surfactants are Octoxynol (also known as Macrogol tetramethylbutylphenyl ether, octylphenoxy polyethoxyethanol, or polyoxyethylene octylphenyl ether), such as Octoxynol 1 , 3, 5, 8, 9, 10, 12, 13, 16, 30, 40, 70 (wherein the number indicates the number of repeating oxyethylene units), or other Octoxynols that comprise different numbers of repeating units of oxyethylene in the side chain, sorbitan esters (such as sorbitan monooleate and sorbitan monostearate, commonly known by their trade names Span 80 and Span 60), polysorbates (such as polysorbate 80 (polyoxyethylene sorbitan monooleate), polysorbate 60 (polyoxyethylene sorbitan monostearate), polysorbate 20
• Octoxynol also known as Macrogol tetramethylbutylphenyl ether, octylphenoxy
• polyoxyethylene sorbitan monolaurate commonly known by their trade names of Tween ® 80, Tween ® 60, Tween ® 20
• poloxamers synthetic block polymers of ethylene oxide and propylene oxide, such as those commonly known by their trade names of Pluronic ® ; e.g., Pluronic ® F127 or Pluronic ® F108
• poloxamines synthetic block polymers of ethylene oxide and propylene oxide attached to ethylene diamine, such as those commonly known by their trade names of
• Tetronic ® e.g., Tetronic ® 1508 or Tetronic ® 908, etc.
• other nonionic surfactants such as Brij ® (polyoxyethylene alkyl ether having a formula of CH3-(CH 2 )io-i6-(O- C 2 H4)i-25-OH), Myrj ® (stearic acid esterified with polyoxyethylene having 40-100 repeating oxyethylene units), and long chain fatty alcohols (e.g., oleyl alcohol, stearyl alcohol, myristyl alcohol, docosahexaenoyi alcohol, etc.) with carbon chains having about 12 or more carbon atoms (e.g., such as from about 12 to about 24 carbon atoms).
• Brij ® polyoxyethylene alkyl ether having a formula of CH3-(CH 2 )io-i6-(O- C 2 H4)i-25-OH
• Myrj ® stearic acid esterified with polyoxyethylene
• polymeric emulsifiers such as those known under the trade name PemulenTM (The Lubrizol Corporation, Wickliffe, Ohio) may be used. These are polymers of acrylic acid, modified by long chain (C10-C30) alkyl acrylates, and crosslinked with allylpentaerythritol.
• An anionic emulsifier may be used, such as sodium or potassium oleate, triethanolamine stearate, sodium lauryl sulfate, sodium dioctyl sulfosuccinate, and sodium docusate. Less preferred are cationic emulsifiers such as quaternary ammonium salts. Still other emulsifiers include glyceryl monostearate,
• polyoxyethylene monooleate polyoxyethylene monostearate, polyoxyethylene monolaurate, potassium oleate, sodium lauryl sulfate, sodium oleate, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan tristearate, sorbitan monooleate, sorbitan trioleate, triethanolamine oleate, polyoxyethylene sorbitan monolaurate, polyoxyethylene sorbitan monopalmitate, polyoxyethylene sorbitan monostearate, polyoxyethylene sorbitan tristearate, polyoxyethylene sorbitan monooleate, and polyoxyethylene sorbitan trioleate.
• the formulation desirably contains a dermatologically acceptable humectant such as glycerin, sorbitol, hexylene glycol, propylene glycol, or urea.
• a dermatologically acceptable humectant such as glycerin, sorbitol, hexylene glycol, propylene glycol, or urea.
• the formulation may contain an emollient such as petrolatum, lanolin, mineral oil, light mineral oil, stearic acid, cyclomethicone, or dimethicone.
• Chelating agents such as EDTA and its salts may be included in a formulation of the present invention.
• the liquid oil component of the composition includes one or more materials that are practically insoluble or insoluble in water and which are liquid at room temperature.
• the liquid oil component of the composition includes one or more materials that are practically insoluble or insoluble in water and which are liquid at room temperature of 22 °C.
• the liquid oil component may be selected from one or more ingredients from the group consisting of dicarboxylic acid esters ("DCAE”), monocarboxylic acid esters (“MCAE”), fish- liver oil, long-chain triglycerides (wherein each side chain has 14-18 carbons, such as peanut oil, sesame oil, coconut oil, sunflower oil, corn oil, olive oil, cotton seed oil, or derivatives thereof), propylene glycol diesters, medium-chain triglycerides (such as those wherein each side chains has 8-10 carbons; e.g., capric/caprylic acid triglycerides), hydrocarbons like mineral oil, light mineral oil, squalene, and squalane, fatty alcohols (such as octyldodecanol and isostearyl alcohol), and fatty acids (such as isostearic acid and oleic acid).
• DCAE dicarboxylic acid esters
• MCAE monocarboxylic acid esters
• the liquid oil component comprises a dicarboxylic acid ester and light mineral oil. In some other embodiments, the liquid oil component comprises one or more long-chain triglycerides.
• the formulation may include other lipophilic liquids in an amount that is sufficient to be miscible with the dicarboxylic acid ester and/or monocarboxylic acid ester.
• the lipophilic liquid may be an emollient such as lanolin oil, mineral oil, light mineral oil, isostearic acid, squalene, octyldodecanol, fractionated coconut oil, cyclomethicone, or dimethicone.
• the formulation may contain water insoluble or practically insoluble ingredients that are not liquid at room temperature, but are soluble in the liquid oil component.
• a DCAE that is suitable for the present invention has the formula
• Ri and R2 are alkyl groups containing between 1 and 4 carbons or aryl groups and may be the same or may be different and wherein (CH2)n is a straight or branched chain and n is between 1 and 12.
• Examples of DCAEs containing one or more aryl groups are dibenzyl esters of dicarboxylic acids.
• a preferred dicarboxylic acid ester is diethyl sebacate, which has the formula CH3CH 2 OOC-(CH2)8-COOCH2CH3.
• Examples of other suitable dicarboxylic acid esters are dimethyl, diethyl, dipropyl, diisopropyl, dibutyl and diisobutyl esters such as oxalate, malate, succinate, glutarate, adipate, pimelate, suberate, and azalate.
• Suitable dicarboxylic acid esters are methyl ethyl, methyl propyl, methyl butyl, methyl isopropyl, ethyl propyl, ethyl butyl, ethyl isopropyl, and propyl butyl esters such as oxalate, malate, succinate, glutarate, adipate, pimelate, suberate, azalate, and sebacate.
• diethyl sebacate is included at 0.1 to 20 wt%, or at 0.5 to 10 wt%, or at 2 to 4 wt% of the weight of the composition.
• the formulation may contain a MCAE.
• the MCAE that is suitable for the present invention has the formula CH3-(CH2)n-COORi, wherein Ri is an alkyl group containing between 1 and 4 carbons or an aryl group, and wherein (CH2)n is straight or branched chain and n is between 1 and 12.
• monocarboxylic acid esters include methyl, ethyl, propyl, isopropyl, butyl, or an aryl such as benzyl formate, acetate,
• propionate, butyrate, valerate, laurate, myristate, palmitate, and stearate examples of preferred monocarboxylic acid esters are isopropyl palmitate and isopropyl myristate.
• the liquid oil phase may beneficially be used to dissolve one or more of the active ingredients within the emulsion.
• the tazarotene component is dissolved in the liquid oil phase within the formulation at room temperature.
• the tazarotene component is suspended within the formulation at room temperature. In the case wherein the tazarotene component is suspended in the formulation, this suspended active ingredient may be
• micronized namely that the mean particle size is preferably about 25 microns in diameter or less.
• a composition of the present invention comprises the ingredients at the concentrations shown in Table 1 .
• Table 1 Table 1
• compositions of the Present Invention for Treating Skin Diseases are provided.
• compositions of the present invention are shown in Table 2.
• a lotion having a composition as shown Composition A of Table 2 may be prepared as follows. [0045] A separate aqueous phase is made. In a manufacturing vessel equipped with a mixing implement (such as a propeller) and temperature control, purified water and disodium edetate dihydrate are combined and the mixture is agitated until a clear solution is achieved. Sorbitol, methylparaben, and propylparaben are then added to the mixture. The mixture is continuously mixed and heated to
• a separate oil phase is made.
• a mixing implement such as a propeller, diethyl sebacate, and tazarotene are combined. The mixture is agitated until a solution is achieved. With continuous mixing, light mineral oil and sorbitan monooleate are added. Mixing is continued until a solution is obtained.
• homogeneous emulsion is obtained.
• Mixing speed is decreased and mixing continued for an additional time of 10 minutes to 1 hour.
• an appropriate amount of the sodium hydroxide solution is added incrementally to obtain a pH of 5.5 ⁇ 0.5.
• Mixing continues further until a homogeneous lotion is obtained, such as for 30 minutes to 3 hours.
• composition A tazarotene
• a first placebo corresponded to and had a similar viscosity as Composition A but lacked tazarotene.
• a second placebo corresponded to the Lotion Placebo but employed carbomer
• Primary inclusion criteria were moderate to severe acne, inflammatory lesion count of at least 20 but no more than 40, and non-inflammatory lesion count of at least 20 but no more than 100.
• the blindly labeled lotions were applied to the affected area once daily for twelve weeks, with assessments at 2 weeks, 4 weeks, 8 weeks and 12 weeks.
• EGSS Global Severity Score
• Clinical Efficacy was determined primarily based on the percentage of subjects who were treatment successes at 12 weeks. To be judged as a treatment success, as reported in Tables 4, 6, and 7, subjects had to show at least two-grade improvement from the baseline and EGSS score equating to "clear" or "almost clear”. Also, the number of inflammatory and non-inflammatory lesions were assessed.
• Table 3 reports Baseline Characteristics.
• Table 4 reports treatment % success on an intention-to-treat (ITT) basis.
• Table 5 reports absolute change in inflammatory lesions from baseline. Change in inflammatory and non-inflammatory lesions from baseline is reported in Figures 2 and 3. Table 5
• Table 6 reports treatment % success on an intention-to-treat basis for EGSS. For lesions, absolute change from baseline to Week 12 in mean inflammatory and non-inflammatory counts is reported.
• Table 7 reports treatment % success on a per-protocol basis for EGSS. For lesions, absolute change from baseline to Week 12 in mean inflammatory and non-inflammatory counts is reported. Table 7
• compositions were tested for cutaneous safety and tolerability. Cutaneous tolerability was assessed by burning, stinging or itching reported by the subjects. This data is summarized in Figure 4. Cutaneous safety was assessed by scaling, erythema, hypo-pigmentation and hyper-pigmentations as evaluated by the investigator. This data is summarized in Figure 5.
• Table 8 reports treatment emergent adverse event characteristics.
• Table 9 reports treatment % success for primary efficacy at week 12.
• EGSS to be judged as a treatment success, subjects had to show at least two- grade improvement from the baseline and EGSS score equating to "clear" or "almost clear”.
• inflammatory and non-inflammatory lesions absolute change from baseline to week in mean inflammatory and non-inflammatory counts is reported.
• composition A containing less than half of the tazarotene active ingredient, had a numerically better efficacy than the Tazorac® 0.1 % Cream. Also, the adverse event profile was lower for
• composition A than for Tazorac® 0.1 % Cream.
• the present invention provides a method for treating acne.
• the method comprises topically applying to an affected area of the body of a subject suffering from acne any one of the compositions of the present invention, as disclosed herein, one or more times per day for a period of time sufficient to treat such acne.
• a period of time may be 1 to 30 days or longer as needed
• such a period of time may be one week, two weeks, four weeks, eight weeks, twelve weeks, or longer as needed.
• a period of time may be 1 to 30 days or longer as needed.
• such a period of time may be one week, two weeks, four weeks, eight weeks, twelve weeks, or longer as needed.
• a period of time may be 1 to 30 days or longer as needed.
• such a period of time may be one week, two weeks, four weeks, eight weeks, twelve weeks, or longer as needed.
• a period of time may be 1 to 30 days or longer as needed.
• a period of time may be one week, two weeks, four weeks, eight weeks, twelve weeks, or longer
• composition of the present invention is applied topically to affected areas of the body once per day for 7-14 days. Alternatively, it may be applied two or three times per day for 7-14 days. Alternatively, it may be applied once per day for one week to six months. For example, it may be applied once per day for two weeks, four weeks, eight weeks, or twelve weeks.
• the treatment may be stopped for 1 -7 days (e.g., 2, 3, 4, 5, 6, or 7 days) after an extended treatment period before it is resumed for another extended treatment period.
• Such an extended period may be 7 days, 7-14 days, 7-21 days, 7-30 days, or longer before more treatment is needed or desired.
• the present invention provides a method of treating acne topically with any of the pharmaceutical compositions of this invention, wherein the composition is applied once daily for more than 2 weeks, such as 4 weeks, for 6 weeks, for 8 weeks or for 12 weeks, without any serious adverse events, and/or with an improved adverse event profile compared to 0.1 % tazarotene cream.
• the present invention provides a method of treating acne topically with any of the pharmaceutical compositions of this invention, wherein the composition is applied once daily for 12 weeks, and has better clinical efficacy and a lower adverse event profile as compared to commercial compositions containing 0.1 % tazarotene.

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• 2018
  • 2018-05-11 CA CA3063371A patent/CA3063371A1/en active Pending
  • 2018-05-11 BR BR112019023817A patent/BR112019023817A8/pt not_active Application Discontinuation
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  • 2018-05-11 JP JP2019562657A patent/JP7410720B2/ja active Active
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