Written by Nicole E. Cieri-Hutcherson, PharmD, BCPS, NCMP | Reviewed by Joshua Murdock, PharmD, BCBBS Key takeaways: If you can’t sleep, over-the-counter (OTC) sleep aids like diphenhydramine (ZzzQuil, Benadryl), doxylamine (Unisom), and melatonin might help. But there are a few things to know about taking them safely.Avoid mixing OTC sleeping pills with alcohol and other...