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:
| Cumulative Use | Increased Risk |
|---|---|
| 1-89 days | 10% higher risk |
| 1-3 years | 49% higher risk |
| 3+ years | 66% higher 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)
What the research shows:
continue to the next page
