atropine deadly nightshade (atropa belladonna) alkaloid molecule. medicinal drug and poison also found in jimson weed (datura

atropine atropin atropa belladonna deadly nightshade jimson weed datura stramonium mandrake mandragora officinarum solanaceae alkaloid muscarine muscarinic acetylcholine receptor parasympathetic neurotransmitter eye ophthalmic ophthalmology mydriatic pupil mydriasis antidote poison poisonous toxic toxin hyoscyamine racemic disease drug therapy medicine medicinal product pharmacology pharmacy pharmaceutical pharma treatment generic molecule atoms chemical chemistry composition atomic model molecular