The main efficacy and action of Azelastine Hydrochloride Eye Drops is to treat seasonal allergic conjunctivitis. The drug needs to be used in accordance with the doctor’s instructions to clarify its adverse reactions and precautions. Azelastine hydrochloride is a commonly used anti-allergic drug in clinical practice, with a relatively long-lasting effect of inhibiting the release of histamine and other inflammatory mediators from mast cells, thus reducing the allergic reaction and improving the relief of symptoms such as itching and tearing of the eyes. The main adverse reaction of the drug is to cause transient burning, eye itching and other irritation symptoms; the use of such drugs is strictly prohibited for patients who are allergic to the drug. Patients should consult a doctor before using the drug and use it under medical supervision. The drug can only be administered by eye-dotting and should not be swallowed.