What’s in over-the-counter sleep meds?
Benadryl® is so effective at making people sleepy, it is commonly used as a sleep aid. Most medications that list “PM” in the name are a combination of some medication mixed with Benadryl®. For example, Tylenol PM® or Advil PM® are a combination of Tylenol® or Advil® and diphenhydramine (or generic Benadryl®). It works to get you to sleep, but is not ideal for chronic use, especially as you get older and the antihistamine effects can be more harmful.