At intervals of five to nine days, healthy volunteers were given two 12.5-mg promethazine ... hours afterward. Promethazine concentration was determined by high-performance liquid chromatography ...

[a] Phenergan 12.5-mg rectal suppository, Wyeth-Ayerst Laboratories, Radnor, PA, lot 9940524. [b] Phenergan 25-mg rectal suppository, Wyeth-Ayerst, lot 9940432. [c] Phenergan 50-mg rectal ...

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 ...