what is promethazine taken for
BRAND NAME: Phenergan, Phenadoz, Promethegan. DRUG CLASS AND MECHANISM: Promethazine is a phenothiazine in the same drug class as chlorpromazine (Thorazine) and trifluoperazine (Stelazine). However, unlike the other drugs in this class, promethazine is not used as an anti-psychotic. It used as an anti-histamine, sedative, and antiemetic (anti-nausea).