Dexamfetamine sulfate (also spelt dexamphetamine sulphate, usually just called dexamfetamine) is a stimulant drug that is used to promote wakefulness and so reduce excessive daytime sleepiness (EDS).
Dexamfetamine is supplied in a number of different forms, but for the treatment of narcolepsy is usually prescribed as a tablet. The tablets may have different strengths: 5mg, 10mg or 20mg. Usually, the overall daily dose is made up of two or more tablets, taken at intervals through the day.
Because there is at present no cure for narcolepsy, the medication that is prescribed for the treatment of narcolepsy aims to control the major symptoms of the condition, particularly excessive daytime sleepiness and cataplexy.