ALLEGRA FOR ADULTS: Allegra provides noticeable relief from indoor and outdoor allergy symptoms. Fast-acting formula goes into effect within an hour of dosage, with antihistamine effects lasting up to 24 hrs, for a full day of relief from allergy symptoms. INDOOR & OUTDOOR ALLERGIES: Allegra relieves allergy symptoms caused by both outdoor & indoor allergens. Turn to Allegra for fast, effective and safe relief from allergy symptoms such as sneezing, runny nose & watery eyes that can last up to 24 hours
