i know if you take tylenol pm or benadryl a lot, your body gets use to it and you either a) can't sleep without it or b) doesn't work anymore or c) all the above.

this happened to me a while back when i had bad insomnia. i wound up getting a Rx for something. don't remember what, but it worked great and was a little pink pill.

bf has lunesta. tried it one night but i got the zaklies really bad.