Adderall XR 20 MG is indicated for the treatment of Attention Deficit Hyperactivity Disorder (ADHD) and narcolepsy. Also used as an athletic performance enhancer and cognitive enhancer, and recreationally as an aphrodisiac and euphoriant. Adderall appears to improve brain development and nerve growth. Randomized controlled trials of continuous stimulant therapy for the treatment of ADHD spanning two years have demonstrated treatment effectiveness and safety.