"the tylenol pm worked .... too good!  after 20 minutes i would have a great night&#039;s sleep.  i have been taking it for years .... then my son told me the new reports about this causing dementia.  i stopped immediately.  the side effects after i stopped have been pretty severe.  i never dreamt that there would be withdrawals from this until i googled it but i have most of the symptoms (except for the shakes and nightmares).... dizzy, light headedness, nausea, unable to sleep.  after all i thought, since i talked to my doctor over and over about them (and he said no problem) and they were over the counter, i was good.  wrong!  bad stuff.  tell everyone you know to stop them."