Many antipsychotic medications, and quite a few others, such as medications used to treat extrapyramidal symptoms and many antidepressants, can cause a cluster of side effects known as anticholinergic symptoms or side effects. So yes, even through you’re taking an anticholinergic medication (Artane, Benadryl, Cogentin) to treat side effects of an antipsychotic medication, they carry their own set of annoying, and potentially dangerous, side effects.
• Dry mouth
• Blurry vision and dry eyes
• Urinary retention
• Confusion and delirium
Anticholinergic side effects are dose dependent and additive, so if you’re on multiple medications that can cause these symptoms; it increases the chances of getting them.
The severity of the side effects ranges from mildly annoying constipation and dry eyes to life-threatening emergencies like bowel obstruction, delirium, coma, and death.