Some (common) causes of anticholinergic syndrome
Antihistamines: promethazine / doxylamine / chlorpheniramine / dexchlorpheniramine
Antipsychotics: quetiapine / olanzapine / chlorpromazine / clozapine / zuclopenthixol
Anticholinergics: benztropine, atropine, glycopyrrolate, hyoscyamine, oxybutynine
Miscellanous medications: carbamazepine
Cyclic antidepressants: amitriptyline, doxepin, clomipramine, nortriptyline
Topical occular mydriatics: cyclopentolate, homatropine, tropicamide
Plants: Atropa belladonna (deadly nightshade); Datura stramonium (jimson weed); Datura suaveolens (Angel’s trumpet); some Amanita mushrooms