1) Antihistamine 2) Diphenhydramine 3) Sudafed alternative 1) Diphenhydramine 
Benadryl (diphenhydramine) is a brand name antihistamine (allergy medicine) marketed over-the-counter by Johnson & Johnson subsidiary McNeil Consumer Healthcare. Before 2007, Benadryl was marketed by Pfizer Consumer Healthcare. Benadryl was first synthesized by George Rieveschl and first made publicly available through prescription in 1946. Benadr...
(ben´ә-drәl) trademark for preparations of diphenhydramine hydrochloride, an antihistamine.
a brand of diphenhydramine.