Fexofenadine is an antihistamine medication that comes in a capsule or tablet form. It treats and prevents symptoms of allergies like itchy eyes, sneezing and hives. Allegra (fexofenadine) is an antihistamine used to treat allergy symptoms, including sneezing, itching, watery eyes, and a runny nose in adults and children. Allegra can also be used to treat hives caused by a condition called chronic idiopathic urticaria in adults and children over 12 years of age. Allegra products are commonly used to treat allergy symptoms such as runny nose, sneezing, itchy/watery eyes, itchy nose or throat, hives, nasal congestion, and sinus pressure. Allegra allergy relief medicine starts working in one hour for relief from sneezing, runny nose, itchy and watery eyes, and itchy nose or throat. One pill provides 24-hour allergy relief that doesn’t make you drowsy and affect your normal brain function. Overview: Fexofenadine is an antihistamine that is taken to help treat allergy symptoms, such as a runny nose, itchy or watery eyes, sneezing, or an itchy nose or throat. Allegra 24 Hour Allergy is also used to treat skin itching and hives caused by a condition called chronic idiopathic urticaria in adults and children at least 6 years old. Fexofenadine is an antihistamine medication used in the treatment of allergy symptoms such as allergic rhinitis and urticaria. [10] It is a common over-the-counter medication available under many brand names (including Allegra), as well as a generic drug. While some other oral antihistamines may cause you to be drowsy, Allegra® won't. Fexofenadine, the active ingredient in Allegra ®, provides non-drowsy allergy relief with 0% brain interference, relieving allergy symptoms like sneezing, runny nose and itchy eyes. Shop for Allegra in Allergy Medicine. Buy products such as Allegra Adult 24-Hour Allergy Relief Tablets, Non-Drowsy Indoor and Outdoor Allergy Medicine, 180 mg Fexofenadine HCI Antihistamine Pill, 40-Count at Walmart and save. Want fast, non-drowsy allergy relief? Allegra helps relieve your toughest allergy symptoms, without the drowsy effect, empowering you to live life fully*, everyday.