Urticaria or hives is a relatively common form of allergic reaction that causes raised red skin welts that range upwards from 5 mm (about a 1/4 inch) in diameter, itch severely, and often have a pale border. Urticaria is caused by direct contact with an allergenic substance (generally a plant, such as poison ivy), or an immune response to food or some other allergen. Hives can also be caused by stress.

Clarinex is used in patients 12 years of age and older to:

§ treat symptoms of seasonal allergic rhinitis (“hay fever”)

§ relieve itching due to hives in patients with recurrent hives