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.
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.