Medical Definition of psychostimulant
: a substance (such as dextroamphetamine or methylphenidate) that has mood-enhancing and stimulant properties, is used medically especially to treat attention deficit disorder or sometimes depression, and is frequently used illicitly Drugs called psychostimulants, which help the brain's network of nerve cells to communicate better, are the most widely used type of drug to treat patients with ADHD.—Virginia Anderson, The Atlanta Journal Constitution, 17 June 2006—often used before another noun A former area high school wrestling star faces trial in Centre County for allegedly forging prescriptions for a psychostimulant drug.—Kevin Amerman, The Morning Call (Allentown, Pennsylvania), 7 Aug. 2009
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