Adderall is a prescription medication that contains a combination of two stimulant drugs, amphetamine, and dextroamphetamine. It is primarily used to treat attention-deficit/hyperactivity disorder (ADHD) and narcolepsy, a sleep disorder. Adderall works by increasing the levels of the neurotransmitters dopamine and norepinephrine in the brain, which helps to improve attention, focus, and alertness.