Medically reviewed by Alex Yampolsky, PharmDMedically reviewed by Alex Yampolsky, PharmD Benadryl is the brand name of the active drug diphenhydramine. It belongs to the class of drugs called ...
ALTHOUGH twenty articles on the clinical effects of Benadryl have appeared in the American literature since early in 1946, when the drug was introduced, only five are to be found on Pyribenzamine.