Rhinase Aqueous Nasal Spray is a medication commonly used to help relieve nasal congestion and symptoms of allergic rhinitis (hay fever). It typically contains ingredients such as a combination of an antihistamine (like azelastine) and a nasal saline solution, which helps to reduce inflammation, irritation, and congestion in the nasal passages. This nasal spray works by blocking histamines, which are chemicals released during allergic reactions, and it can also help to moisturize and clear nasal passages. Rhinase is used for conditions like hay fever, seasonal allergies, or other irritations that cause nasal congestion and discomfort.