Dexedrine is the brand name. Its generic name is Dextroamphetamine sulfate. This medication is also sold under the brand name Dextrostat, Liquadd, ProCentra, and Zenzedi. Dexedrine is the most effective medicine for the treatment of ADHD (attention deficit hyperactivity disorder) in children and adults. This medicine is used to help to regulate sleep-wake cycles in the brain (narcolepsy).