Answer: Chlortrimiton (found in the allergy section of drugstore) can cause sleepiness, yet not leave you groggy, or feeling "hung over." It is available in 4 mg, 8 mg, and 12 mg tablets. (You mentioned having tried melatonin - that is available in 1mg and 3 mg tablets. Perhaps you took the 1 mg and need 3mg.) I have tried both and found them to be effective, without side effects. (Tylenol PM didn't do a thing...)All OTC sleep aids contain diphenhydramine HCL which is simply benedryl. I dont recommend taking Tylenol PM if you dont have any reason to take a pain reliever. I take 2 benedryls every night and sleep a full 8 hrs and wake up not feeling groggy. There are also tea's you can try, one is called Sleepy time Extra.