Allegra 24 Hour Allergy Relief Tablets, Non-DrowsyRelieve your hay fever and allergy symptoms like runny nose, sneezing, itchy, watery eyes, itchy nose, or itchy throat. Allegra starts working in one hour twice as fast as Claritin* and won't leave you feeling drowsy like Zyrtec. That is why it's the #1 allergist recommended non drowsy allergy brand. Antihistamine 24 hour allergy relief Non drowsy Active Ingredient Fexofenadine Hydrochloride 180 mg (in each tablet) An antihistamine that works to