in study i , 40 young men were randomly assigned in equal numbers to either a control ( lactose placebo ) , dimenhydrinate ( 50 mg ) , promethazine hydrochloride ( 25 mg ) , or mixture ( 25 mg promethazine plus 10 mg d-amphetamine ) group .
C0546876
promethazine hydrochloride
C0033405
promethazine