Related: Benadryl for Dogs: Side Effects of Long-Term Use At normal doses, Benadryl is quite safe, but a survey of over 600 dogs (1) found the following signs of overdose: Three of the dogs in ...

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 ...

Rest Better – Diphenhydramine ... Directed – These HCl antihistamine tablets should always be used as directed. Please read package for more details on proper use and dosage.