I don't know if this will help anyone else, but I'll put it out there:
OTC sleep aids usually use an antihistamine, for the side-effect of making you drowsy. Not all are equal.
I go to sleep easily, but tend to wake up early - hours early. Doxylamine Succinate stays in your system longer, and will help you stay asleep. I buy 25mg tablets that break in half, so I'm getting 12-13mg, and that works for me.
