Benadryl (diphenhydramine) is an over-the-counter (OTC) antihistamine commonly used to treat allergies that is also sometimes used as a sleep aid for insomnia. Benadryl is only intended for the ...

These include sleep aids and allergy drugs that contain antihistamines, such as: diphenhydramine (Benadryl) doxylamine succinate (Nyquil) While diphenhydramine and doxylamine succinate are ...