Azelta 137 mcg Nasal Spray is an antihistamine medication used to alleviate symptoms of allergic rhinitis, such as sneezing, runny or itchy nose, and nasal congestion. It contains azelastine hydrochloride, a selective H1-receptor antagonist that works by blocking histamine, a substance in the body responsible for allergic symptoms. This nasal spray provides rapid relief and is typically administered as one or two sprays per nostril twice daily, depending on age and condition severity. Common side effects may include a bitter taste, headache, and nasal irritation. Patients are advised to follow proper administration techniques and consult healthcare professionals before use