Adderall is available in a regular-release type that lasts 4 to six hrs and an extended-launch kind (Adderall XR) that works for approximately 12 hours. Brand name-name Adderall XR and generic Adderall and Adderall XR are offered as amphetamine/dextroamphetamine and prolonged-release amphetamine/dextroamphetamine.These with a valid prescription mig