Cromolyn capsules are used to prevent allergy symptoms, especially respiratory allergies such as allergic asthma, cough, and shortness of breath. They work by stabilizing mast cells in the body and preventing them from secreting substances that cause inflammation and allergy, such as histamine. They are also used in cases of allergic rhinitis and to prevent asthma symptoms resulting from exercise or exposure to dust and pollen. Cromolyn helps reduce allergy attacks when used regularly according to the doctor's instructions. It is not considered an immediate treatment for symptoms, but rather is used as a continuous prevention. It must be continued even when there are no symptoms to ensure its effectiveness. It is also advised not to stop taking it suddenly without consulting a doctor.