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An anticholinergic is a medicine that blocks acetylcholine, a chemical messenger involved in involuntary body functions. Anticholinergics affect the bladder, gut, lungs, eyes, sweat glands, heart, and brain. They can treat several conditions, but they can also cause noticeable side effects. Older adults are more sensitive to confusion, falls, and memory-related problems from anticholinergic medicines.
read more about anticholinergic ...Acetylcholine helps send signals between nerves, muscles, glands, and organs. Anticholinergics block acetylcholine at muscarinic receptors, reducing certain automatic body actions. This can relax bladder muscles, reduce secretions, widen pupils, or decrease spasms in selected conditions. The same blocking effect can also cause dry mouth, constipation, and blurred vision.
Anticholinergics are used for overactive bladder, motion sickness, Parkinson-related tremor, muscle spasms, COPD, gastrointestinal cramping, and certain eye exams. Some medicines are prescribed for their anticholinergic effect, while others have anticholinergic side effects even if that is not the main purpose. Examples can include bladder medicines, some antihistamines, some antidepressants, and some antipsychotics. A pharmacist can help identify anticholinergic burden when several medicines are taken together.
Examples include oxybutynin, tolterodine, solifenacin, benztropine, trihexyphenidyl, scopolamine, ipratropium, tiotropium, atropine, and dicyclomine. Diphenhydramine and some older antihistamines also have anticholinergic effects. Eye-care anticholinergics include atropine, cyclopentolate, and tropicamide. The risk profile depends on the medicine, dose, route, age, and other health conditions.
Common side effects include dry mouth, dry eyes, constipation, blurred vision, dizziness, fast heartbeat, and trouble urinating. More serious effects can include confusion, delirium, overheating from reduced sweating, severe urinary retention, or worsening narrow-angle glaucoma. Risk increases when several anticholinergic medicines are taken together. Seek urgent care for severe confusion, high fever, inability to urinate, chest symptoms, or sudden eye pain with vision changes.
Anticholinergic means the medicine blocks acetylcholine activity. This changes nerve signals that control involuntary functions such as urination, digestion, sweating, and pupil size.
Some antihistamines have anticholinergic effects, especially older ones such as diphenhydramine. Newer antihistamines tend to have fewer anticholinergic effects, but side effects can still happen.
Older adults can be more sensitive to confusion, dizziness, falls, constipation, urinary retention, and memory-related effects. A clinician or pharmacist can review whether the benefits outweigh the risks.
Yes, dry mouth is one of the most common anticholinergic effects. Dry eyes, constipation, blurred vision, and trouble urinating can also occur.
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