Used primarily in ophthalmic formulations to treat allergic conjunctivitis. It acts as a mast cell stabilizer and antihistamine, helping to prevent the release of inflammatory mediators involved in ocular allergic reactions. It effectively relieves symptoms such as itching, redness, and tearing of the eyes. Due to its dual mechanism of action and rapid onset, it is commonly prescribed for seasonal and perennial allergic eye conditions. It is well tolerated and suitable for both short-term and long-term use in adults and children.