Long term safety (52 weeks) of GW685698X on the nasal mucosa via nasal biopsy with an active control group (Nasonex®) and a healthy volunteers control group in subjects 18 years old with perennial allergic rhinitis . Allergic rhinitis is an inflammatory disorder of the upper airway that occurs following allergen exposure. Perennial allergic rhinitis is triggered by house dust mites, animal dander, etc., possibly causing symptoms year-round including nasal congestion, rhinorrhea and/or nasal itching.