Clotrimazole and betamethasone dipropionate cream USP, 1%/0.05% (base), contains combinations of clotrimazole USP, an azole antifungal, and betamethasone dipropionate USP, a corticosteroid, for topical use.
Chemically, clotrimazole USP is 1-[(2-Chlorophenyl)diphenylmethyl]-1H-imidazole, with the empirical formula C
22H
17ClN
2, a molecular weight of 344.84, and the following structural formula:
Clotrimazole_structure (B96c5ac5 0b73 49cb B704 F48d639752ff 01)
Clotrimazole USP is a white to pale yellow, crystalline powder, odorless, practically insoluble in water, freely soluble in methanol, in acetone, in chloroform, and in alcohol.
Betamethasone dipropionate USP has the chemical name 9-fluoro-11β,17,21-trihydroxy-16β-methylpregna-1,4-diene-3,20-dione 17,21-dipropionate, with the empirical formula C
28H
37FO
7, a molecular weight of 504.59, and the following structural formula:
Betamethasone_structure (B96c5ac5 0b73 49cb B704 F48d639752ff 02)
Betamethasone dipropionate USP is a white to almost white crystalline powder, practically insoluble in water, freely soluble in acetone and in methylene chloride, sparingly soluble in alcohol.
Each gram of clotrimazole and betamethasone dipropionate cream USP, 1%/0.05% (base) contains 10 mg of clotrimazole USP and 0.643 mg of betamethasone dipropionate USP (equivalent to 0.5 mg of betamethasone), in a white to off-white, hydrophilic cream consisting of benzyl alcohol, cetyl alcohol plus stearyl alcohol, ceteareth-30, mineral oil, monobasic sodium phosphate monohydrate, phosphoric acid, propylene glycol, sodium hydroxide, white petrolatum and purified water.