Tazarotene

INDICATIONS AND USAGE Tazarotene cream, 0.1% is indicated as an adjunctive agent for use in the mitigation (palliation) of facial fine wrinkling, facial mottled hyper-and hypopigmentation, and benign facial lentigines in patients who use comprehensive skin care and sunlight avoidance programs. Tazarotene cream, 0.1% is a retinoid indicated as an adjunctive agent for use in the mitigation (palliation) of facial fine wrinkling, facial mottled hyper- and hypopigmentation, and benign facial lentigines in patients who use comprehensive skin care and sunlight avoidance programs. ( 1 ) Limitations of Use: Does not eliminate or prevent wrinkles or restore more youthful skin. ( 1 ) Does not repair sun damaged skin or reverse photoaging. ( 1 ) Safety and effectiveness for the prevention or treatment of actinic keratoses, skin neoplasms, or lentigo maligna have not been established. ( 1 , 5.4 ) Limitations of Use: Tazarotene cream does not eliminate or prevent wrinkles or restore more youthful skin. Tazarotene cream does not reverse photoaging or repair sun damaged skin; tazarotene cream does not mitigate coarse or deep wrinkling, tactile roughness, telangiectasia, skin laxity, keratinocytic atypia, melanocytic atypia, or dermal elastosis. The safety and the effectiveness of tazarotene cream for the prevention or treatment of actinic keratoses, skin neoplasms, or lentigo maligna have not been established.

DOSAGE AND ADMINISTRATION Apply a pea-sized amount of tazarotene cream to lightly cover the entire face once daily at bedtime. ( 2 ) If contact with eyes occurs, rinse thoroughly with water. ( 2 ) Not for ophthalmic, oral, or intravaginal use. ( 2 ) 2.1 Assessment Prior to Treatment Initiation Obtain a pregnancy test within 2 weeks prior to tazarotene cream therapy. Initiate tazarotene cream therapy during a menstrual period [see Contraindications (4) , Warnings and Precautions (5.1) , and Use in Specific Populations (8.1 , 8.3) ] . Carefully assess facial pigmented lesions of concern by a qualified physician (e.g., dermatologist) before application of tazarotene cream [see Warnings and Precautions (5.4) ] . 2.2 Important Administration Instructions Avoid accidental transfer of tazarotene cream into eyes, mouth, or other mucous membranes. If contact with mucous membranes occurs, rinse thoroughly with water [see Warnings and Precautions (5.2) ] . Wash hands thoroughly after application. Emollients or moisturizers can be applied either before or after applying tazarotene cream. However, ensure that the first cream or lotion has absorbed into the skin and has dried completely before subsequent cream or lotion application. Use facial moisturizers as frequently as desired [see Warnings and Precautions (5.2) ]. Tazarotene cream is for topical use only. Tazarotene cream is not for ophthalmic, oral, or intravaginal use. Use effective sunscreens and wear protective clothing while using tazarotene cream [see Warnings and Precautions (5.3) ]. 2.3 Dosage and Administration Instructions Remove any makeup before applying tazarotene cream to the face. Dry the skin before applying the cream after face washing, bathing, or showering. Apply a pea-sized amount once a day at bedtime to lightly cover the entire face, including the eyelids, if desired. Wash hands thoroughly after application.

WARNINGS AND PRECAUTIONS • Embryofetal Toxicity: Tazarotene gel contains tazarotene, which is a teratogen. Tazarotene gel is contraindicated in pregnancy. Females of child-bearing potential should have a negative pregnancy test within 2 weeks prior to initiating treatment and use an effective method of contraception during treatment. ( 5.1 ) • Local Irritation: Excessive pruritus, burning, skin redness or peeling can occur. If these reactions occur, discontinue until the integrity of the skin has been restored, or consider reducing dosing frequency or in the case of psoriasis, consider switching to the lower concentration. Tazarotene gel should not be used on eczematous skin, as it may cause severe irritation. ( 5.2 ) • Photosensitivity and Risk for Sunburn: Avoid exposure to sunlight, sunlamps, and weather extremes. Wear sunscreen daily. Tazarotene gel should be administered with caution if the patient is also taking drugs known to be photosensitizers. ( 5.3 ) 5.1 Embryofetal Toxicity Based on data from animal reproduction studies, retinoid pharmacology and the potential for systemic absorption, tazarotene gel may cause fetal harm when administered to a pregnant female and is contraindicated during pregnancy. Tazarotene elicits malformations and developmental effects associated with retinoids after topical and oral administration to pregnant rats and rabbits during organogenesis. Systemic exposure to tazarotenic acid is dependent upon the extent of the body surface area treated. In patients treated topically over sufficient body surface area, exposure could be in the same order of magnitude as in orally treated animals. Although there may be less systemic exposure in the treatment of acne of the face alone due to less surface area for application, tazarotene is a teratogenic substance and causes fetal malformations in animals, and it is not known what level of exposure is required for teratogenicity in humans [see Clinical Pharmacology (12.3)] . There were thirteen reported pregnancies in subjects who participated in the clinical trials for topical tazarotene. Nine of the subjects had been treated with topical tazarotene, and the other four had been treated with vehicle. One of the subjects who was treated with tazarotene cream elected to terminate the pregnancy for non-medical reasons unrelated to treatment. The other eight pregnant women who were inadvertently exposed to topical tazarotene during the clinical trials subsequently delivered apparently healthy babies. As the exact timing and extent of exposure in relation to the gestation times are not certain, the significance of these findings is unknown. Females of Child-bearing Potential Females of child-bearing potential should be warned of the potential risk and use adequate birth-control measures when tazarotene gel is used. The possibility that a female of child-bearing potential is pregnant at the time of institution of therapy should be considered. A negative result for pregnancy test should be obtained within 2 weeks prior to tazarotene gel therapy. Tazarotene gel therapy should begin during a normal menstrual period [see Use in Specific Populations (8.1)] . 5.2 Local Irritation and Hypersensitivity Reactions Application of tazarotene gel may cause excessive irritation in the skin of certain sensitive individuals. Local reactions (including blistering and skin desquamation, pruritus, burning, erythema) and hypersensitivity adverse reactions (including urticaria) have been observed with topical tazarotene. If these adverse reactions occur, consider discontinuing the medication or reducing the dosing frequency, as appropriate, until the integrity of the skin is restored. Alternatively, patients with psoriasis who are being treated with the 0.1% concentration can be switched to the lower concentration. Frequency of application should be closely monitored by careful observation of the clinical therapeutic response and skin tolerance. Therapy can be resumed, or the drug concentration or frequency of application can be increased as the patient becomes able to tolerate treatment. Concomitant topical medications and cosmetics that have a strong drying effect should be avoided. It is also advisable to "rest" a patient's skin until the effects of such preparations subside before treatment with tazarotene gel is initiated. Tazarotene gel, should not be used on eczematous skin, as it may cause severe irritation. Weather extremes, such as wind or cold, may be more irritating to patients using tazarotene gel. 5.3 Photosensitivity and Risk for Sunburn Because of heightened burning susceptibility, exposure to sunlight (including sunlamps) should be avoided unless deemed medically necessary, and in such cases, exposure should be minimized during the use of tazarotene gel. Patients must be warned to use sunscreens and protective clothing when using tazarotene gel. Patients with sunburn should be advised not to use tazarotene gel until fully recovered. Patients who may have considerable sun exposure due to their occupation and those patients with inherent sensitivity to sunlight should exercise particular caution when using tazarotene gel. Tazarotene gel should be administered with caution if the patient is also taking drugs known to be photosensitizers (e.g., thiazides, tetracyclines, fluoroquinolones, phenothiazines, sulfonamides) because of the increased possibility of augmented photosensitivity.

CONTRAINDICATIONS Tazarotene Foam is contraindicated in pregnancy. Tazarotene Foam may cause fetal harm when administered to a pregnant woman. Tazarotene elicits teratogenic and developmental effects associated with retinoids after topical or systemic administration in rats and rabbits [see Use in Specific Populations (8.1 , 8.3) ]. If this drug is used during pregnancy, or if the patient becomes pregnant while taking this drug, treatment should be discontinued and the patient apprised of the potential hazard to the fetus [see Warnings and Precautions (5.1) , Use in Specific Populations (8.1 , 8.3) ]. Pregnancy. ( 4 , 8.1 )

DRUG INTERACTIONS No formal drug-drug interaction studies were conducted with Tazarotene Foam. Concomitant dermatologic medications and cosmetics that have a strong drying effect should be avoided. It is recommended to postpone treatment until the effects of these products subside before use of Tazarotene Foam is started. Concomitant use with oxidizing agents, such as benzoyl peroxide, may cause degradation of tazarotene and may reduce the clinical efficacy of tazarotene. If combination therapy is required, they should be applied at different times of the day (e.g., one in the morning and the other in the evening). The impact of tazarotene on the pharmacokinetics of progestin-only oral contraceptives (i.e., minipills) has not been evaluated. In a trial of 27 healthy female subjects between the ages of 20 to 55 years receiving a combination oral contraceptive tablet containing 1 mg norethindrone and 35 mcg ethinyl estradiol, concomitant use of tazarotene did not affect the pharmacokinetics of norethindrone and ethinyl estradiol over a complete cycle. Avoid concomitant dermatologic medications and cosmetics that have a strong drying effect. ( 7 )

ADVERSE REACTIONS The following serious adverse reactions are discussed in more detail in other sections of the labeling: Embryofetal toxicity [see Warnings and Precautions ( 5.1 )] Photosensitivity and Risk of Sunburn [see Warnings and Precautions ( 5.3 )] Plaque Psoriasis: Most common adverse reactions occurring in 10 to 30% of patients are pruritus, burning/stinging, erythema, worsening of psoriasis, irritation, and skin pain. ( 6.1 ) Acne Vulgaris: Most common adverse reactions occurring in 10 to 30% of patients are desquamation, burning/stinging, dry skin, erythema and pruritus. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Cosette Pharmaceuticals, Inc. at 1-800-922-1038 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in clinical practice. Psoriasis A total of 439 subjects 14 to 87 years of age were treated with tazarotene gel, 0.05% and 0.1% in two controlled clinical trials. The most frequent adverse events reported with tazarotene gel, 0.05% and 0.1% occurring in 10 to 30% of subjects, in descending order, included pruritus, burning/stinging, erythema, worsening of psoriasis, irritation, and skin pain. Reactions occurring in 1 to 10% of subjects included rash, desquamation, irritant contact dermatitis, skin inflammation, fissuring, bleeding, and dry skin. Increases in “psoriasis worsening” and “sun-induced erythema” were noted in some subjects over the 4th to 12th months of treatment as compared to the first three months of a 1 year study. In general, the incidence of adverse events with tazarotene gel 0.05% was 2 to 5% lower than that seen with tazarotene gel 0.1%. Acne A total of 596 subjects 12 to 44 years of age were treated with tazarotene gel, 0.05% and 0.1% in two controlled clinical trials. The most frequent adverse events reported during clinical trials with tazarotene gel, 0.1% in the treatment of acne occurring in 10 to 30% of subjects, in descending order, included desquamation, burning/stinging, dry skin, erythema and pruritus. Reactions occurring in 1 to 10% of subjects included irritation, skin pain, fissuring, localized edema and skin discoloration. 6.2 Postmarketing Experience Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure. The following adverse reactions have been identified during postapproval use of tazarotene. Skin and subcutaneous tissue disorders: blister, dermatitis, urticaria, skin exfoliation, skin discoloration (including skin hyperpigmentation or skin hypopigmentation), swelling at or near application sites, and pain.

CLINICAL PHARMACOLOGY 12.1 Mechanism of Action Tazarotene is a retinoid prodrug which is converted to its active form, the carboxylic acid of tazarotene, by deesterification. Tazarotenic acid binds to all three members of the retinoic acid receptor (RAR) family: RARα, RARβ, and RARγ, but shows relative selectivity for RARβ, and RARγ and may modify gene expression. The clinical significance of these findings for the treatment of plaque psoriasis and facial acne vulgaris is unknown. 12.2 Pharmacodynamics The pharmacodynamics of tazarotene gel in the treatment of plaque psoriasis and facial acne vulgaris are unknown. 12.3 Pharmacokinetics Following topical application, tazarotene undergoes esterase hydrolysis to form its active metabolite, tazarotenic acid. Little parent compound could be detected in the plasma. Tazarotenic acid was highly bound to plasma proteins (greater than 99%). Tazarotene and tazarotenic acid were metabolized to sulfoxides, sulfones and other polar metabolites which were eliminated through urinary and fecal pathways. The half-life of tazarotenic acid was approximately 18 hours, following topical application of tazarotene to normal, acne or psoriatic skin. The human in vivo studies described below were conducted with tazarotene gel applied topically at approximately 2 mg/cm 2 and left on the skin for 10 to 12 hours. Both the peak plasma concentration (C max ) and area under the plasma concentration time curve (AUC) refer to the active metabolite only. Two single, topical dose studies were conducted using 14 C-tazarotene gel. Systemic absorption, as determined from radioactivity in the excreta, was less than 1% of the applied dose (without occlusion) in six subjects with psoriasis and approximately 5% of the applied dose (under occlusion) in six healthy subjects. One non-radiolabeled single-dose study comparing the 0.05% gel to the 0.1% gel in healthy subjects indicated that the C max and AUC were 40% higher for the 0.1% gel. After 7 days of topical dosing with measured doses of tazarotene 0.1% gel on 20% of the total body surface without occlusion in 24 healthy subjects, the C max for tazarotenic acid was 0.72 ± 0.58 ng/mL (mean ± SD) occurring 9 hours after the last dose, and the AUC 0-24hr for tazarotenic acid was 10.1 ± 7.2 ng·hr/mL. Systemic absorption was 0.91 ± 0.67% of the applied dose. In a 14-day study in five subjects with psoriasis, measured doses of tazarotene 0.1% gel were applied daily by nursing staff to involved skin without occlusion (8 to 18% of total body surface area; mean ± SD: 13 ± 5%). The C max for tazarotenic acid was 12.0 ± 7.6 ng/mL occurring 6 hours after the final dose, and the AUC 0-24hr for tazarotenic acid was 105 ± 55 ng·hr/mL. Systemic absorption was 14.8 ± 7.6% of the applied dose. Extrapolation of these results to represent dosing on 20% of total body surface yielded estimates for tazarotenic acid with C max of 18.9 ± 10.6 ng/mL and AUC 0-24hr of 172 ± 88 ng·hr/mL. An in vitro percutaneous absorption study, using radiolabeled drug and freshly excised human skin or human cadaver skin, indicated that approximately 4 to 5% of the applied dose was in the stratum corneum (tazarotene: tazarotenic acid = 5:1) and 2 to 4% was in the viable epidermis-dermis layer (tazarotene: tazarotenic acid = 2:1) 24 hours after topical application of the gel.