Generic name:promethazine hydrochloride
Dosage form: rectal suppository
Drug classes:Antihistamines, Phenothiazine antiemetics
Medically reviewed by Drugs.com. Last updated on May 23, 2022.
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Phenergan Suppositories Description
Each rectal suppository contains 50 mg promethazine HCl with ascorbyl palmitate and polysorbate 80 in a specially blended base of saturated vegetable fatty acids. Phenergan (Promethazine HCl) Suppositories, USP 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:
Promethazine HCl occurs as a white to faint yellow, practically odorless, crystalline p
