your son has apparently experienced positive results with Concerta which is a form of methylphenidate, while Adderall is a form of
dextroamphetamine (Ritalin and Dexedrine). Frequently the forms of methylphenidate
work better for ADHD Hyperactive while the dextroamphetamines work better for the Inattentive.
Which is your son? To compound matters further if he is an "active" young man, is his activity "motor" or "distractablitIy" driven?