Dexedrine is a brand name for the medication dextroamphetamine, which is a central nervous system stimulant. It is primarily prescribed to treat Attention Deficit Hyperactivity Disorder (ADHD) and narcolepsy, a sleep disorder. By increasing the levels of certain neurotransmitters in the brain, Dexedrine helps improve focus, attention, and impulse control. This medication is available in both immediate-release and extended-release forms. Common side effects may include insomnia, dry mouth, and increased heart rate. It is important for patients to follow their doctor's instructions and discuss any concerns or potential interactions with other medications.