Used primarily in ophthalmology, this chemical is an antihistamine and mast cell stabilizer effective in treating allergic conjunctivitis. It helps relieve symptoms such as itching, redness, and swelling of the eyes caused by seasonal allergies. Its dual mechanism reduces immediate and late-phase allergic reactions, making it suitable for both acute and chronic use. Due to its favorable safety profile and rapid onset of action, it is commonly formulated in ophthalmic solutions for topical application.