Eurax (Crotamiton Topical) - Description and Clinical Pharmacology

FOR TOPICAL USE ONLY
NOT FOR OPHTHALMIC, ORAL, OR INTRAVAGINAL USE

DESCRIPTION

Eurax (crotamiton USP) is a scabicidal and antipruritic agent available as a cream or lotion for topical use only. Eurax provides 10% (w/w) of the synthetic, crotamiton USP, in a vanishing-cream or emollient-lotion base containing: carbomer-934, cetyl alcohol, diazolidinylurea, dimethicone, fragrance, laureth-23, magnesium aluminum silicate, magnesium nitrate, methylchloroisothiazolinone, methylisothiazolinone, petrolatum, propylene glycol, sodium hydroxide, steareth-2, and water. In addition, the cream contains glyceryl stearate. Crotamiton is N-ethyl-N-(o -methylphenyl)-2-butenamide and its structural formula is:

Crotamiton USP is a colorless to slightly yellowish oil, having a faint amine-like odor. It is miscible with alcohol and with methanol. Crotamiton is a mixture of the cis and trans isomers. Its molecular weight is 203.28.

CLINICAL PHARMACOLOGY

Eurax has scabicidal and antipruritic actions. The mechanisms of these actions are not known. The pharmacokinetics of crotamiton and its degree of systemic absorption following topical application have not been determined.