Antihistamines
Diphenhydramine
Overactive Bladder Medications
Oxybutynin
Some Antidepressants
Amitriptyline
Paroxetine
These medications are effective for certain conditions, but doctors are increasingly evaluating how long they should be used safely.
What the Study Found
The large-scale study followed more than 250,000 adults aged 55 and older over several years.
Researchers discovered several important patterns:
People who used strong anticholinergic medications daily for 3 or more years had about a 50% higher risk of developing dementia.
Risk increased with higher cumulative doses.
The link was strongest with medications that have high anticholinergic activity, including some muscle relaxants and bladder medications.
Importantly, short-term or occasional use—such as taking an antihistamine for a few days—was not associated with increased dementia risk.
Why This Matters for Back Pain Treatment
Back pain is one of the top reasons Americans visit doctors each year.
