Adderall and Mydayis[10] are trade names for a mixture drug referred to as blended amphetamine salts ("MAS" items) made up of 4 salts of amphetamine. The mixture is composed of equal sections racemic amphetamine and dextroamphetamine, which provides a (3:1) ratio (by excess weight) involving dextroamphetamine and levoamphetamine, the two enantiomer