What is the mechanism of action of Cromolyn?

Cromolyn acts as a mast cell stabilizer, which is crucial for its role in managing asthma and allergic conditions. By stabilizing mast cells, Cromolyn inhibits the release of inflammatory mediators such as histamine, leukotrienes, and other substances that contribute to bronchoconstriction and airway inflammation. This action helps prevent asthma symptoms from occurring, especially in response to allergens or irritants.

The mechanism of action relating to mast cell stabilization is particularly important because it addresses the underlying process that triggers asthma exacerbations, rather than just alleviating symptoms after they have appeared. By preventing mast cell degranulation, Cromolyn reduces inflammation and protects the airways, making it an effective preventive measure for asthma management.

In the context of the other options, they do not accurately reflect the primary mechanism of Cromolyn. While decreasing secretions is a desirable effect in some therapies, it is not the primary mechanism of Cromolyn. Bronchodilation typically refers to medications that relax the muscles of the airways, which is not how Cromolyn functions. Lastly, antihistamines work by blocking the action of histamine rather than preventing its release, which is not Cromolyn's mechanism.