Eycrom, commonly known as Cromolyn Sodium when referred to in a medical context, is a medication primarily used for the management and prevention of allergic reactions. It functions as a mast cell stabilizer, which means it works by preventing the release of substances in the body that cause inflammation and allergic symptoms. Eycrom is often administered in the form of eye drops to treat and prevent symptoms of allergic conjunctivitis, such as itching, redness, and tearing. It can also be found in other forms, such as inhalers or nasal sprays, for the treatment of asthma and allergic rhinitis, respectively. Due to its mechanism of action, Eycrom is most effective when used regularly as a preventive measure rather than as a treatment for acute symptoms.