Efficacy and Safety of Azelastine +Mometasone , Nasal Spray, 140 mcg + 50 mcg, (Sandoz d.d., Slovenia) and Momat Rino Advance, Nasal Spray, 140 mcg + 50 mcg, (Glenmark, India) Administered as a Monotherapy to Patients With Seasonal Allergic Rhinitis.

Prospective, multicenter, open, randomized, parallel, clinical study for assessment of comparative efficacy and safety of Azelastine +Mometasone Sandoz (main group) and Momat Rino Advance (control group) administered as a monotherapy to patients with seasonal allergic rhinitis (SAR).

The maximum observation period will be 22 days. Study periods * Screening (Visit 1): 1 day prior to Run-In period start (-4 day before study treatment ). * Run-In Period: 3 days prior to first administration of test product/reference product (-3 to -1 days before study treatment). * Randomization (Visit 2): assignment of test product/reference product to the patient (study treatment: day 1). * Administration of test product/reference product within Study days 1 to 14 and observation at Visits 2, 3, 4 which correspond to study days 1, 7, 15, respectively. * Period of follow-up (Visit 5): 36-96 h after last administration of test product/reference product. Performed in a form of a phone call (study treatment: days 16-18). Patients meeting the inclusion criteria and not meeting the non-inclusion criteria will be randomized into 2 groups in a 1:1 ratio. Dose of test product/reference product and dosing regimen used in this study are based on PIL of original product Momat Rino Advance approved by Ministry of Healthcare of the Russian Federation which is used in this study as a reference product. Test product and reference product in this study will be administered according to the following regimen: Group 1 (n=236) will receive test product Azelastine + Mometasone, nasal spray, 140 mcg + 50 mcg/dose (Sandoz d.d., Slovenia), one actuation in each nostril twice daily, morning and evening (recommended interval between administrations is approximately 12 hours), for 14 consecutive days. Group 2 (n=236) will receive reference product Momat Rhino Advance, nasal dosed spray, 140 mcg + 50 mcg mcg/dose (Glenmark Pharmaceuticals Limited., India), one actuation in each nostril twice daily, morning and evening (recommended interval between administrations is approximately 12 hours), for 14 consecutive days All study procedures for both groups at each phase of study are identical.