Allevia 120mg Fexofenadine Hayfever Allergy Relief – 7 Tablets (X5). Allevia 120mg tablets containfexofenadine hydrochloride, an antihistamine used for the symptomatic relief of allergic rhinitis. This product is designed to help relieve common allergy and hayfever symptoms, including sneezing, runny nose, itchy nose, and itchy or watery eyes.