scopolamine

1. (pharmacology) A poisonous alkaloid C₁₇H₂₁NO₄ similar to atropine that is found in various solanaceous plants and is used for its anticholinergic effects (such as preventing nausea in motion sickness and inducing mydriasis).Examples: "I had been shot full of dope to keep me quiet. Perhaps scopolamine too, to make me talk."; "The Incas had herbs for headaches and other pains; and they used scopolamine, a poison from the datura plant, as an anaesthetic."; "Scopolamine is a nonselective muscarinic acetylcholine receptor (mAChR) antagonist with potentially selective inhibitory actions on muscarinic subtypes 1 and 2 (M1 and M2). Unlike ketamine, esketamine, and nitrous oxide, scopolamine directly affects the cholinergic pathway but does not directly modulate the glutamatergic pathway."Synonyms: devil's breathcountableuncountable