You get used to it.
SOME get used to it, not ALL.
You get used to it.
B shift eh?
yes sir
Preface - IANAD
OP - as far as getting to sleep when your body doesn't want to (and restricting to over the counter medicines), I've personally had success with melatonin, and there's some research supporting its efficacy as well. Just follow the directions on the back - allot 8 hours of sleep, take 30 minutes before you want to BE asleep, then lay down and start trying to sleep. It has variable effects on people, but it may work for you. I would try it on a night preceding an off day before using it prior to work for that reason (it isn't supposed to disrupt your sleep cycles, but some people feel funky the next day).
I would recommend trying generic benadryl (diphenhydramine) - it's the ingredient in tylenol PM that makes you drowsy, and it is WAY cheaper as generic benadryl.