Alert: 8 medications that can affect cognition in older adults
The headline “8 drugs that cause serious dementia” is too strong. These medicines do not inevitably cause dementia or “brain damage.” However, some medications—particularly those with anticholinergic effects—can cause confusion and delirium and have been associated with increased dementia risk, especially with greater cumulative exposure.
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PubMed Central (PMC)
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Examples that deserve a medication review in older adults include:
Diphenhydramine — common in some allergy and nighttime products.
Doxylamine — used in some OTC sleep aids.
Amitriptyline — an antidepressant with strong anticholinergic effects.
Paroxetine — an antidepressant with significant anticholinergic activity.
Oxybutynin — used for overactive bladder; it has particularly strong evidence for adverse cognitive effects.
Benztropine — an anticholinergic medication used for certain movement disorders.
Dicyclomine — used for intestinal cramping.
Some antipsychotics, including olanzapine and haloperidol — particularly concerning in people who already have dementia because of increased risks of stroke, cognitive decline, and mortality.
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PubMed Central (PMC)
What should you do?
Don’t stop any prescribed medication suddenly. Instead, ask a doctor or pharmacist to review your medications—especially if an older person has developed new confusion, memory problems, excessive sleepiness, hallucinations, or repeated falls.
The important issue isn’t simply whether someone takes one of these drugs. Doctors should consider the person’s condition, dose, duration, alternatives, and total anticholinergic burden.
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PubMed Central (PMC)
If you give me the names of the medications you’re taking, I can tell you which ones have meaningful cognitive risks and which ones generally do not.
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