This study is to evaluate the equivalence of generic Azelastine Hydrochloride and Fluticasone Propionate Nasal Spray with that of the marketed drug, Dymista™ Nasal Spray, in the treatment of seasonal allergic rhinitis, and to evaluate the safety and tolerability of generic Azelastine Hydrochloride and Fluticasone Propionate nasal spray compared with Dymista™ nasal spray.