The pharmacokinetics of promethazine hydrochloride after administration of rectal suppositories at three dosage strengths and oral syrup were studied. The study had an open-label, randomized ...

After enrollment and completion of study period 1 (treatment D, 50 mg [10 mL] of promethazine oral syrup), one subject was withdrawn from the study because of violation of study protocol.

Promethazine HCl 6.25mg, dextromethorphan HBr 15mg; per 5mL; liq; contains alcohol 7%. Dextromethorphan is an antitussive agent and, unlike the isomeric levorphanol, it has no analgesic or ...