Adderall and Mydayis[10] are trade names for a combination drug named mixed amphetamine salts ("MAS" items) that contains four salts of amphetamine. The combination is composed of equal parts racemic amphetamine and dextroamphetamine, which produces a (3:1) ratio (by excess weight) among dextroamphetamine and levoamphetamine, The 2 enantiomers of a