Buy Adderall XR 1O mg online Prescription drugs like Adderall are frequently used to treat narcolepsy and attention deficit hyperactivity disorder (ADHD). It is a combination of two stimulant drugs: amphetamine and dextroamphetamine. Adderall works by increasing certain neurotransmitters in the brain, specifically dopamine and norepinephrine, which regulate attention, behavior, and impulse control.