Subjects selected for this study will have a history of allergic rhinitis and a positive RAST or skin test to a perennial (year round) allergen and have symptoms that correlate with this allergen. If prior skin test or RAST is not available, a skin test will be performed to confirm allergic rhinitis. The patients will be seen in either the Allergy, Asthma, and Respiratory research center or the GCRC. All care and all studies will be done free of charge at no cost to the subject. Each subject will be compensated for his or her participation as outlined below.