A substance that reduces or counteracts stimulation or overstimulation in the body or nervous system.
From anti- (against) + stimulant (from Latin stimulare, to prick or urge). This pharmacological term developed in the 19th century as doctors categorized drug effects.
Antistimulants are the pharmacological opposites of coffee and energy drinks—they calm your nervous system instead of revving it up! Modern examples include sedatives and some anxiety medications.
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