Alert! 8 Drugs That Cause Serious Dementia

Used for: Overactive bladder, allergies, depression, Parkinson’s, COPD

This is the most concerning category—and the one many people don’t know they’re taking.

What the research shows:
A 2025 Swedish nationwide study found that strong anticholinergics were associated with a dose-dependent increase in dementia risk:

Another 2025 study of over 217,000 participants found that any use of anticholinergic medications was associated with a 6-15% increased dementia risk, depending on the cohort.

Common anticholinergic drugs to watch:

• Oxybutynin (Ditropan) – overactive bladder

• Diphenhydramine (Benadryl, Tylenol PM, Advil PM) – allergies, sleep

• Amitriptyline, nortriptyline – depression, nerve pain

• Hydroxyzine (Atarax, Vistaril) – anxiety, allergies

• Cyclobenzaprine (Flexeril) – muscle spasms

What to do: Request a medication review with your doctor. Many conditions have non-anticholinergic alternatives (see safer options below).

😴 3. Sleep Medications (OTC and Prescription)

Used for: Insomnia

What the research shows:
A 15-year study published in the Journal of Alzheimer’s Disease found that people who reported taking sleep medications “often or almost always” had a significantly increased risk of developing dementia.

Specific medications studied included:

• Antihistamines (diphenhydramine, doxylamine)

• Trazodone

• Zolpidem (Ambien)

• Benzodiazepines (temazepam, estazolam)

• Certain antidepressants with sedating effects

What to do: Try non-medication approaches first: consistent bedtime routines, avoiding caffeine/alcohol before bed, limiting naps, and cognitive behavioral therapy for insomnia (CBT-I), which has strong efficacy without medication risks.

💔 4. Antidepressants (Certain Types)

Used for: Depression, anxiety, nerve pain

What the research shows:
The Swedish nationwide study identified certain antidepressants among the strong anticholinergic medications associated with increased dementia risk. Specifically:

• Amitriptyline

• Nortriptyline

• Paroxetine (unique among SSRIs for its anticholinergic effects)

• Doxepin (especially at higher doses)

Important nuance: Not all antidepressants carry this risk. SSRIs like sertraline (Zoloft) , citalopram (Celexa) , and escitalopram (Lexapro) have lower anticholinergic burden.

What to do: Don’t stop your antidepressant abruptly. If you’re concerned, ask your doctor about switching to a lower-risk option.

🫀 5. Proton Pump Inhibitors (Prilosec, Nexium, Prevacid)

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