n. brand name for an over-the-counter allergy medicine (antihistamine). Diphenhydramine is the generic name for this drug. In terms of treatment and relief, it blocks histamines which create allergic reactions and constrict nasal passageways.

BENADRYL: "As an antihistamine, Benadryl counteracts the allergy-causing effects of a histamine."
Cite this page: N., Pam M.S., "BENADRYL," in, April 7, 2013, (accessed September 25, 2021).