Promethazine and diphenhydramine are both strong, sedating (drowsy) antihistamines. NHS guidance advises against taking these ...
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 addictive ...
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