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: a drug that causes the nervous system to become more active so that a person feels more energy and mental excitement
Full Definition of AMPHETAMINE
: a racemic compound C9H13N or one of its derivatives (as dextroamphetamine or methamphetamine) frequently abused as a stimulant of the central nervous system but used clinically especially as the sulfate or hydrochloride salt to treat hyperactive children and the symptoms of narcolepsy and as a short-term appetite suppressant in dieting
: a racemic sympathomimetic amine C9H13N or one of its derivatives (as dextroamphetamine or methamphetamine) frequently abused as a stimulant of the central nervous system but used clinically especially in the form of its sulfate C9H13N·H2SO4 to treat attention deficit disorder and narcolepsy and formerly as a short-term appetite suppressant—see benzedrine
Organic compound, prototype of a class of synthetic amphetamine drugs (e.g., Benzedrine, Dexedrine, methamphetamine), that stimulates the central nervous system. It was first synthesized in 1887. Amphetamines cause wakefulness, euphoria, decreased fatigue, and increased ability to concentrate. Since they dull the appetite, they have been used for weight reduction. Often called speed, they are used (often illicitly) to stay awake. In children with attention deficit (hyperactivity) disorder, they have a calming effect, helping them concentrate. Undesirable effects include overstimulation, with paranoia, restlessness, insomnia, tremor, and irritability, and a deep depression when the drug wears off. This, along with rapid development of tolerance requiring increased doses, can lead to drug addiction.