https://medznow.com/adderall-vs-dexedrine/

Adderall and Dexedrine are CNS stimulants for ADHD and narcolepsy, both Schedule II drugs that boost dopamine and norepinephrine.​ Adderall blends dextroamphetamine and levoamphetamine salts (3:1 ratio), targeting CNS and peripheral systems for balanced effects. Dexedrine uses only dextroamphetamine for potent, focused CNS action. Adderall XR lasts 11-12 hours with broader strengths (5-30 mg); Dexedrine Spansule offers a similar duration but fewer options.