 The purpose of this study is to assess the effect of an aqueous nasal spray investigational compound compared to placebo on the hypothalamic pituitary adrenocortical HPA axis system in adolescents and adults 12 to 65 years of age with perennial allergic rhinitis. This study can last up to 6 weeks and you will come to the clinic up to 7 times. Clinic visits include physical examinations, vital sign assessments, clinical laboratory assessments, ECGs and allergy skin testing. You will need to complete a daily diary card and spend the night in the clinic on 2 occasions to collect urine and blood samples over 24 hour periods. 