Amphetamine is thought to inhibit monoamine oxidase, While the ability of amphetamine and its metabolites to inhibit various P450 isozymes and various enzymes has not been sufficiently elucidated. In vitro experiments with human microsomes indicate minimal inhibition of CYP2D6 by amphetamine and small inhibition of CYP1A2, 2D6, and 3A4 by https://prosyntheticchems.com/product/adderall-xr/