Describing drugs or substances that block the action of acetylcholine (a neurotransmitter), often used to treat conditions like muscle spasms, overactive bladder, or motion sickness.
Anti- + cholinergic (relating to cholinergic, from acetylcholine + -ergic meaning 'working'). The term emerged in mid-20th century pharmacology as scientists mapped neurotransmitter systems.
Anticholinergic drugs are everywhere in modern medicine—from antihistamines to medications for Parkinson's—yet this category was completely unknown before scientists discovered acetylcholine in the 1920s.
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