Fexofenadine is in a class of medications called antihistamines. It works by blocking the effects of histamine, a substance in the body that causes allergy symptoms. Fexofenadine is used to relieve the allergy symptoms of seasonal allergic rhinitis (”hay fever”), including runny nose, sneezing, red, itchy or watery eyes, itching of the nose, throat, roof of the mouth in adults and children 2 years of age and older. It is also used to relieve symptoms of urticaria (hives, red, itchy raised areas of the skin), including itching and rash in adults and children 6 months of age and older.