Adderall and Mydayis[10] are trade names for a combination drug termed mixed amphetamine salts ("MAS" merchandise) made up of 4 salts of amphetamine. The mixture is composed of equal components racemic amphetamine and dextroamphetamine, which generates a (3:1) ratio (by body weight) between dextroamphetamine and levoamphetamine, the two enantiomers