Buy Adderall Online | Order Adderall Online | Overnight Fedex | Adderall contains a combination of amphetamine and dextroamphetamine. Amphetamine and dextroamphetamine are central nervous system stimulants that affect chemicals in the brain and nerves that contribute to hyperactivity and impulse control.Adderall is used to treat narcolepsy and attention deficit hyperactivity disorder (ADHD). Adderall may also be used for purposes not listed in this medication guide.