Promethazine Suppositories

Generic name: promethazine hydrochloride
Dosage form: rectal suppository
Drug classes:Antihistamines, Phenothiazine antiemetics

Medically reviewed by Drugs.com. Last updated on Aug 1, 2021.

Rx Only

Promethazine Suppositories Description

Each rectal suppository contains 12.5 mg or 25 mg promethazine HCl with ascorbyl palmitate, cocoa butter, colloidal silicon dioxide, and white wax. Promethazine Hydrochloride Suppositories are for rectal administration only.

Promethazine HCl is a racemic compound; the empirical formula is C17H20N2S•HCl and its molecular weight is 320.88. Promethazine HCl, a phenothiazine derivative, is designated chemically as 10H-Phenothiazine, 10-ethanamine, N,N,α-trimethyl-,monohydrochloride, (±)- with the following structural formula:

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