both fenfluramine ( 0.5 , 1.0 , 2.0 , 4.0 , 8.0 mg/kg ) and d-amphetamine ( 0.25 , 0.5 , 1.0 , 2.0 mg/kg ) produced dose related decreases in this drinking with d-amphetamine approximately four times as potent as fenfluramine . d-amphetamine produced large increases in overall rates of lever pressing and greatly decreased the duration of postreinforcement pauses .
C0011812
d-amphetamine
C0002658
amphetamine