Adderall XR 15 mg is a prescription medication used to treat Attention Deficit Hyperactivity Disorder (ADHD) and narcolepsy. It is an extended-release formulation, which means it is designed to release the medication gradually over time to provide longer-lasting effects throughout the day. The primary active ingredients are amphetamine and dextroamphetamine, which are stimulant medications that work by affecting certain chemicals in the brain, helping to increase focus, attention, and impulse control in people with ADHD.