Adderall and Mydayis[10] are trade names for a mixture drug known as combined amphetamine salts ("MAS" solutions) made up of 4 salts of amphetamine. The mixture is composed of equal areas racemic amphetamine and dextroamphetamine, which provides a (three:one) ratio (by weight) in between dextroamphetamine and levoamphetamine, the two enantiomers of