A Randomized, Placebo Controlled Study to Determine the Efficacy and Speed of a Nasal Spray in Allergen Induced Seasonal Allergic Rhinitis

Inclusion Criteria: * History of seasonal allergic rhinitis to ragweed pollen for last 2 consecutive seasons; * Positive response to skin prick test to ragweed allergen at screening; * Be willing to participate in the trial. Exclusion Criteria: * History of hypersensitivity to azelastine; * Females who are pregnant or lactating; * Relative chronic sinusitis or nasal structural abnormalities causing greater than 50% obstruction; * Asthma that requires other than occasional use of inhaled short-acting beta-2 antagonist; * Known non-responsiveness to antihistamines; * Alcoholism or drug abuse within 2 yrs. of screening; * Current or regular use within 6 months of any type of tobacco product; * Evidence of any clinically significant hematological, renal, endocrine, pulmonary, gastrointestinal, cardiovascular, hepatic, psychiatric, neurologic or malignancies within the last 5 years; * History of a positive test to HIV, TB, hepatitis B or C.