Adderall is a prescription medication that is used to treat ADHD (Attention Deficit Hyperactivity Disorder) and narcolepsy. Adderall contains a combination of amphetamine and dextroamphetamine, two stimulant medications that increase focus, attention, and alertness in people with ADHD types, because it helps increase the amount of dopamine and norepinephrine in the brain. Adderall is an immediate-release and extended-release formulation, and the duration of effects can last anywhere from 4 to 12 hours depending on the formulation.