administered alone , d-amphetamine ( 0.1-3.0 mg/kg ) , cocaine ( 1.0-3.0 mg/kg ) and bupropion ( 1.0-30 mg/kg ) either did not affect or decreased fixed-ratio responding of pigeons , whereas d-amphetamine ( 0.056-0.3 mg/kg ) either increased or decreased ( 0.56 mg/kg ) responding of monkeys maintained under the fixed-interval schedule .
C0002658
amphetamine
C0011812
d-amphetamine