What is Promethazine?
Promethazine is a first-generation antihistamine and phenothiazine derivative. It works by blocking histamine (to reduce allergy symptoms) and has additional effects as a:
Sedative (helps with sleep or anxiety).
Antiemetic (prevents/treats nausea and vomiting, including motion sickness or post-surgery).
Anticholinergic (at higher doses, it can cause drowsiness or other effects).












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