Medically reviewed by Daniel Combs, MD Benadryl (diphenhydramine) is an over-the-counter (OTC) antihistamine commonly used to ...

The normal dose of Benadryl varies somewhat depending on what ... so an allergic dog might just sleep. The reason that some people are nervous about using it, however, is that their dog may ...

Benadryl is a human medication that can be used in dogs to relieve allergy symptoms. But you have to be sure you're giving the right dose for your dog's size. (Photo Credit: E+/Getty Images ...