The "harmless" sleep aids that raise dementia risk & erode memory

These 9 drowsiness-inducing medications are perceived as harmless, especially if Over-The-Counter types. Seemingly something you could take nightly, long-term, with no risk...think again.

Turns out the easily-accessed anticholinergic Over-The-Counter medications that people with insomnia use off-label nightly for years, thinking they're innocuous because OTC, are turning out to predict increased dementia risk.

http://www.youtube.com/watch?v=CkldFczgwIg

These drowsiness-inducing medications all seem indispensable for maintaining sleep & controlling sleep threats like overactive bladder or congested sinuses, when you suffer insomnia. But sedation is not sleep, even if it appears more "knocked out". Welcome to anticholinergic medications polypharmacy - the very common unwitting longterm use of multiple harmless-seeming OTC and low-dose anticholinergic medications for sleep: antihistamines like Benadryl or Restavit, overactive-bladder antimuscarinics promoting urinary retention to reduce night-time toilet trips, & low-dose Amitryptaline. All memory-disrupting, so the question arises: what are they doing to REM sleep?

Well, it so happens that anticholinergic drugs suppress and disrupt rapid eye movement (REM) sleep by blocking acetylcholine, needed to trigger and maintain dream sleep. This leads to a delayed start to REM sleep, less total time spent in REM, and impacts on memory processing. Remember, REM sleep is important for memory consolidation and emotion regulation. So is the sedation worth it, longer term?

The harmless sleep aids that increase dementia risk & erode memory

28 Jul 2026 Rosemary Clancy