generic name of benadryl
How it works: Diphenhydramine comes in 25mg minitabs or 50mg capsules, and is a generic version of Benadryl. As an antihistamine, it counteracts the effect of histamine, which causes symptoms like itching and sneezing.Cautions: This medication should not be used in pregnant or nursing animals.o not give sinus or cold medicines containing diphenhydramine to your pet. What are the side effects : Side effects of diphenhydramine include drowsiness, dry mouth and urinary retention. Rarely, vomiting and diarrhea can occur.