The dexamfetamine - A central nervous system stimulant (see amphetamine drugs; stimulant drugs) sometimes used to treat narcolepsy (a sleep disorder). It is also used in children with attention deficit hyperactivity disorder who have not responded to treatment with methylphenidate.

Because of its stimulant properties, dexamfetamine has become a drug of abuse. Excessive use leads to anxiety and drug psychosis. With prolonged use, physical tolerance develops: the drug’s stimulant effects lessen and a higher dose must then be taken to produce the same effect. Drug dependence (a physical or mental need for the drug) also develops after repeated use.


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