Adderall is a prescription stimulant medication used to treat attention-deficit hyperactivity disorder (ADHD) and narcolepsy. It contains a combination of amphetamine salts that increase dopamine and norepinephrine activity in the brain, improving focus, attention span, and impulse control. Adderall is available in both immediate-release (IR) and extended-release (XR) forms. Due to its potential for dependence and side effects, it should be used under close medical supervision.