CLOTRIMAZOLE AND BETAMETHASONE DIPROPIONATE

Clotrimazole and Betamethasone Dipropionate Cream USP, 1%/0.05%, contains combinations of clotrimazole, an azole antifungal, and betamethasone dipropionate, a corticosteroid, for topical use. Chemically, clotrimazole is 1–(o-chloro-α,α-diphenylbenzyl) imidazole, with the empirical formula C 22 H 17 CLN 2 , a molecular weight of 344.84, and the following structural formula: Clotrimazole is an odorless, white crystalline powder, insoluble in water and soluble in ethanol. Betamethasone dipropionate has 9-fluoro-11β,17,21-trihydroxy-16β-methylpregna-1,4-diene-3,20-dione 17,21-dipropionate, with the empirical formula C 28 H 37 FO 7 , a molecular weight of 504.59, and the following structural formula: Betamethasone dipropionate is a white to creamy-white, odorless crystalline powder, insoluble in water. Each gram of clotrimazole and betamethasone dipropionate cream contains 10 mg clotrimazole, USP and 0.64 mg betamethasone dipropionate, USP (equivalent to 0.5 mg betamethasone), in a hydrophilic cream consisting of ceteareth-30, cetostearyl alcohol, mineral oil, phosphoric acid, propylene glycol, purified water, sodium phosphate monobasic monohydrate, white petrolatum; benzyl alcohol as preservative. Chemical Structure Chemical Structure

Clotrimazole and Betamethasone Dipropionate Cream is a combination of an azole antifungal and corticosteroid and is indicated for the topical treatment of symptomatic inflammatory tinea pedis, tinea cruris, and tinea corporis due to Epidermophyton floccosum , Trichophyton mentagrophytes , and Trichophyton rubrum in patients 17 years and older. Clotrimazole and Betamethasone Dipropionate Cream contains a combination of clotrimazole, an azole antifungal, and betamethasone dipropionate, a corticosteroid, and is indicated for the topical treatment of symptomatic inflammatory tinea pedis, tinea cruris, and tinea corporis due to Epidermophyton floccosum , Trichophyton mentagrophytes , and Trichophyton rubrum in patients 17 years and older. ( 1 )

Treatment of tinea corporis or tinea cruris: Apply a thin film of clotrimazole and betamethasone dipropionate cream into the affected skin areas twice a day for one week. Do not use more than 45 grams per week. Do not use with occlusive dressings. If a patient shows no clinical improvement after 1 week of treatment with clotrimazole and betamethasone dipropionate cream, the diagnosis should be reviewed. Do not use longer than 2 weeks. Treatment of tinea pedis: Gently massage a sufficient amount of clotrimazole and betamethasone dipropionate cream into the affected skin areas twice a day for two weeks. Do not use more than 45 grams per week. Do not use with occlusive dressings. If a patient shows no clinical improvement after 2 weeks of treatment with clotrimazole and betamethasone dipropionate cream, the diagnosis should be reviewed. Do not use longer than 4 weeks. Clotrimazole and betamethasone dipropionate cream is for topical use only. It is not for oral, ophthalmic, or intravaginal use. Avoid contact with eyes. Wash hands after each application. Tinea pedis: Apply a thin film to the affected skin areas twice a day for 2 weeks. Do not use longer than 4 weeks. ( 2 ) Tinea cruris and tinea corporis: Apply a thin film to the affected skin area twice a day for 1 week. Do not use longer than 2 weeks. ( 2 ) Do not use with occlusive dressings unless directed by a physician. ( 2 ) Not for ophthalmic, oral or intravaginal use. ( 2 )

None. None. ( 4 )

Most common adverse reactions reported for clotrimazole and betamethasone dipropionate cream were paraesthesia in 1.9% of patients and rash, edema, and secondary infections each in less than 1% of patients. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Northstar RxLLC at 1-800-206-7821 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Trial 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 practice. In clinical trials common adverse reaction reported for clotrimazole and betamethasone dipropionate cream was paresthesia in 1.9% of patients. Adverse reactions reported at a frequency < 1% included rash, edema, and secondary infection. 6.2 Postmarketing Experience Because adverse 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 local adverse reactions have been reported with topical corticosteroids: itching, irritation, dryness, folliculitis, hypertrichosis, acneiform eruptions, hypopigmentation, perioral dermatitis, allergic contact dermatitis, maceration of the skin, skin atrophy, striae, miliaria, capillary fragility (ecchymoses), telangiectasia, and sensitization (local reactions upon repeated application of product). Ophthalmic adverse reactions of blurred vision, cataracts, glaucoma, increased intraocular pressure, and central serous chorioretinopathy have been reported with the use of topical corticosteroids, including topical betamethasone products. Adverse reactions reported with the use of clotrimazole are: erythema, stinging, blistering, peeling, edema, pruritus, urticaria, and general irritation of the skin.

Store at 20° to 25°C (68° to 77°F) [see USP Controlled Room Temperature].