Adderall is a popular prescription drug used to treat attention deficit hyperactivity disorder (ADHD) and narcolepsy. However, procuring it can be difficult, especially . Adderall is a medication that is used to treat attention deficit hyperactivity disorder (ADHD) and narcolepsy. It is a central nervous system stimulant that works by increasing the amount of dopamine and norepinephrine in the brain. Adderall is available as an immediate-release tablet or an extended-release capsule. The extended-release capsule is designed to release the medication slowly over time so that it can be taken once daily.