Levoamphetamine causes lack of focus.
 Dyanavel XR, a liquid suspension form became available in 2015, and contains about 24% levoamphetamine
1:1 mixture of dextro- to levo- amphetamine base equivalent pharmaceutical that contains equal amounts (by weight) of four salts: dextroamphetamine sulfate, amphetamine sulfate, dextroamphetamine saccharate and amphetamine (D,L)-aspartate monohydrate

