Article: Perennial Allergic Rhinitis.

Patients with perennial allergic rhinitis are more likely than those with seasonal allergic rhinitis to have asthma and to use an intranasal steroid in addition to a second-generation antihistamine, according to an analysis of information in a medical insurance claims database.

William Crown, Ph.D., speaking at the annual meeting of the American College of Allergy, Asthma, and Immunology in Seattle, reported on findings from his retrospective study of medical and prescription claims for 47,579 patients. All patients had been prescribed one of the three second-generation antihistamines used for treating allergic rhinitis during a 12-month period.

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