Anticholinergic Effects of Antipsychotic Medications

Introduction to Anticholinergic Properties

• Cognitive impairment, memory deficits, and potential cognitive blunting are concerns with anticholinergic antipsychotics, particularly in schizophrenia patients, as schizophrenia itself already impacts cognition 1
• Anticholinergic effects increase the risk of delirium, especially in older adults, and cause peripheral side effects including dry mouth, constipation, urinary retention, and blurred vision 2

Clinical Implications and Recommendations

• The American Academy of Child and Adolescent Psychiatry recommends avoiding anticholinergic antipsychotics like clozapine and low-potency typical antipsychotics in sensitive populations, such as older adults and patients with cognitive impairment 3
• The Mayo Clinic Proceedings suggests that strongly anticholinergic medications should be avoided in older adults as they can worsen cognition, increase fall risk, and contribute to delirium 2
• Patients with cognitive impairment should avoid anticholinergic burden as it can exacerbate cognitive deficits, according to the Journal of the American Academy of Child and Adolescent Psychiatry 1
• The Pediatrics journal notes that aripiprazole's unique mechanism as a partial dopamine receptor agonist may contribute to its favorable side effect profile 4

Special Considerations for Vulnerable Populations

• Older adults should avoid strongly anticholinergic medications, which can increase the risk of delirium, worsen cognition, and contribute to falls, as stated in the Mayo Clinic Proceedings 2
• Patients on multiple medications should consider the total anticholinergic burden across all prescribed medications to avoid cumulative effects, according to the Mayo Clinic Proceedings 2