anticholinergic burden
Cumulative effect of multiple medications with anticholinergic properties, increasing risk of cognitive impairment and other adverse effects.
Full Definition
Anticholinergic burden refers to the cumulative anticholinergic activity resulting from concurrent use of multiple medications that block muscarinic acetylcholine receptors, even when individual drugs have relatively weak anticholinergic properties. This concept is particularly important in psychiatry because many psychotropic medications contribute to anticholinergic burden, including tricyclic antidepressants, first-generation antipsychotics, certain antihistamines, and medications used to treat extrapyramidal symptoms. The cumulative effect can lead to significant cognitive impairment, particularly in elderly patients, as well as peripheral anticholinergic effects such as dry mouth, constipation, urinary retention, and blurred vision. Various scales and tools have been developed to quantify anticholinergic burden, helping clinicians identify high-risk medication combinations. Reducing anticholinergic burden may improve cognitive function and reduce falls risk, particularly in geriatric populations.
Usage
Usage note: Emphasize the cumulative nature rather than effects of individual medications; may reference specific burden scales when applicable.
In Context
- "The geriatrician recommended reducing the patient's anticholinergic burden to improve cognitive function." — Consultation report
- "Assessment of anticholinergic burden should consider all medications, not just those with obvious anticholinergic properties." — Medication review protocol