Adderall and Mydayis[ten] are trade names for a mixture drug referred to as blended amphetamine salts ("MAS" items) made up of four salts of amphetamine. The mixture is composed of equivalent pieces racemic amphetamine and dextroamphetamine, which creates a (3:1) ratio (by body weight) between dextroamphetamine and levoamphetamine, the two enantiom