Adderall is a prescription drug that contains two ingredients – dextroamphetamine and amphetamine. It comes under the class of stimulant medications, specifically the central nervous system stimulants. It works by stimulating the nerves and the brain to induce a calming effect and help the person with ADHD focus on a given task. Prolonged use of this drug can develop physical or psychological dependence, so the authorities classified this medicine as a controlled substance in the United States. You will need a doctor’s prescription to buy Adderall online or at your local drugstore. Uses Adderall helps treat symptoms of attention deficit hyperactivity disorder (ADHD). Doctors sometimes also prescribe this drug for treating sleeping disorders like narcolepsy. Doctors regard it as a first-choice treatment for ADHD. Several studies support the claims that it improves focus and attention, and it also reduces impulsive behavior. About 75-80% of children with ADHD experienced improved symptoms when treated with Adderall. It works by altering the number of certain neurotransmitters in the brain, which increases the focusing and concentrating abilities of a person.