Experience fast*, all-day relief from tough allergy symptoms like runny nose, sneezing, itchy or watery eyes, and itchy nose or throat with Allegra® 24 Hour Tablets. Allegra (fexofenadine) is an antihistamine used to treat allergy symptoms, including sneezing, itching, watery eyes, and a runny nose. Includes Allegra side effects, interactions, and indications. Fexofenadine (Allegra) is an antihistamine that treats and prevents allergy symptoms. It blocks histamine to reduce your symptoms. Allegra® provides effective relief from allergy symptoms with 0% brain interference, keeping you alert and non-drowsy. Find patient medical information for Fexofenadine (Allegra) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings Allegra 120mg Tablet is used in the treatment of Urticaria, Allergic rhinitis. Find Allegra 120mg Tablet uses, composition, side-effects, price, substitutes, drug interactions, precautions, warnings, and expert advice. Allegra (Fexofenadine Hcl) may treat allergy, side effects, dosage, drug interactions, warnings, patient labeling, reviews, and related medications including drug comparison. Medscape - Seasonal allergic rhinitis, chronic idiopathic urticaria-specific dosing for Allegra (fexofenadine), frequency-based adverse effects, comprehensive interactions, contraindications, pregnancy & lactation schedules, and cost information. Detailed dosage guidelines and administration information for Allegra (fexofenadine hydrochloride). Includes dose adjustments, warnings and precautions. 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. [11] Therapeutically, fexofenadine is a selective peripheral H 1 blocker.