Amphetamine is a racemic mixture of d-amphetamine and l-amphetamine. The d-isomer is more potent in its CNS effects. The l-isomer has a longer elimination half-life and is more potent than the d-isomer in its cardiovascular effects. For a clear summary of the differences between dextroamphetamine and levoamphetamine, click HERE. Short duration of action 1. Mixed…