What are some commonly used drugs with anticholinergic side effects?

Altered mental status secondary to polypharmacy is common. Drugs with anticholinergic side effects are often contributory ... here's a list of some common ones:

• antihistamines ie diphenhydramine, hydroxyzine, meclizine, promethazine (Phenergan)


• neuroleptics ie olanzapine (Zyprexa), quetiapine (Seroquel)


• antiparkinsonian drugs - benztropine (Cogentin)


• tricyclic antidepressants


• antispasmodics ie dicyclomine (bentyl), oxybutynin (Ditropan),


• sleep aids ie doxylamine (Unisom)


• cold preparations


• scopolamine


• atropine

Su, Mark MD and Goldman, Matthew MD. "Anticholinergic poisoning." Up to Date. 12 June 2008.