Mast cell stabilizers are used to treat asthma, allergic rhinitis (hay fever), and allergic conjunctivitis. They work by preventing mast cells from releasing histamine and other chemicals that cause allergic reactions. Mast cell stabilizers come in different forms, including oral solutions, nasal sprays, and eye drops. Examples include cromolyn oral solution (Gastrocrom), cromolyn nasal spray (NasalCrom), and lodoxamide (Alomide). You can discuss with your healthcare team which option might be right for you.