Adderall and Mydayis[10] are trade names for a combination drug known as mixed amphetamine salts ("MAS" items) that contains 4 salts of amphetamine. The combination is composed of equal sections racemic amphetamine and dextroamphetamine, which produces a (3:1) ratio (by body weight) between dextroamphetamine and levoamphetamine, the two enantiomers