Dextroamphetamine (D-AMP) is a central nervous system (CNS) stimulant and an amphetamine. This medication is used to treat attention deficit hyperactivity disorder (ADHD). It works by altering the concentration of certain natural substances in the brain. Dextroamphetamine belongs to the class of drugs known as stimulants. It can increase your attention, improve your concentration on an activity, and control behavioral problems. It can also help you organize your tasks and improve your listening comprehension.