Azelastine hydrochloride is a prescription, option for allergic conjunctivitis that works quickly and reliably. With combined antihistamine and mast cell–stabilizing effects, it provides rapid relief of itching, redness, and tearing—often within minutes—with symptom control lasting up to 8–10 hours. It is generally well tolerated and approved for use in adults and children over age 3, typically dosed as one drop in each eye twice daily. Some users may notice mild, short-lived side effects such as a bitter taste or brief eye irritation, but these are usually transient. Overall, azelastine is a solid choice when first-line OTC options are insufficient or when faster symptom relief is needed.