Been taking Tylenol PM <and now, generic versions of just the ‘PM’ part; don’t need the Tylenol, so don’t take the Tylenol> for about 12 years. Without it, I operate on a 20-22 hour day followed by a ten hour night. That’s just not acceptable when I work a 40 hour a week job. Never had any kind of ‘hangover’ from it. It kicks in after an hour, and after 2, I am asleep if I am lying down, no matter how much I want to finish this or that book.
But…I also have problems GETTING to sleep, not staying asleep; they are two different problems, and I suspect the PM stuff might not work for those waking up in the middle of the night wide awake, as I have been awakened by a sister in labor, after being asleep for 2 hours, and was indeed able to drive to the hospital without a problem. And, if I recall correctly, I’ve actually taken it and stayed awake just to see what would happen. Nothing happens; it just wears off.
Again, no side effects, and it’s never lost it’s effectiveness; just as glad to not be taking Tylenol every day, though, so thank goodness the price on that dropped. For a while, it was more expensive w/o the Tylenol than with it. O.o
For the record: Melatonin works for me for one night. By the second night, and continuing on through the third and 4th <I haven’t been tempted to try further> I have incrediblely vivid, freaky dreams. I do not like them. I’ve tried this only twice, but both experiments were the same, and honestly, I want to SLEEP, not feel like I just acted out Blade Runner all night.