has part has role amphetamine A racemate comprising equimolar amounts of (<i>R</i>)-amphetamine (also known as levamphetamine or levoamphetamine) and (<i>S</i>)-amphetamine (also known as dexamfetamine or dextroamphetamine. amphetamines bronchodilator agent sympathomimetic agent adrenergic uptake inhibitor xenobiotic adrenergic agent (R)-amphetamine (S)-amphetamine dopaminergic agent neurotoxin dopamine uptake inhibitor racemate environmental contaminant