Used primarily in the treatment of allergic conditions such as allergic rhinitis and allergic conjunctivitis. It works by stabilizing mast cells and preventing the release of histamine, thereby reducing symptoms like itching, sneezing, and watery eyes. Also used in the management of asthma, particularly in children, due to its dual action as an antihistamine and mast cell stabilizer. Commonly found in ophthalmic formulations for eye allergies and available in oral form for long-term control of allergic reactions.