Benadryl Allergy is an antihistamine that provides adults with effective and soothing relief from various allergies, including perennial and seasonal allergic rhinitis (hay fever), vasomotor rhinitis, and allergic conjunctivitis triggered by inhalant allergens and food. It also helps alleviate allergic reactions to blood or plasma and dermatographism. Additionally, Benadryl serves as a therapy for anaphylactic reactions, supporting standard measures and epinephrine treatment once acute symptoms are under control.