Snapshot Introduction One of 7 medications used for asthma aimed to reduce inflammation and obstruction corticosteroids β-agonists muscarinic agonists methylxanthines cromolyn sister drug nedocromil used similarly in asthma antileukotrienes omalizumab Cromolyn Mechanism of action mast cell stabilizer prevents degranulation and subsequent release of inflammatory mediators Clinical uses asthma inhaled or nebulized form prophylaxis is most common use login to view 2 more bullets maintenance login to view 3 more bullets systemic mastocytosis oral form allergic rhinitis nasal form vernal keratoconjunctivitis ophthalmic form Adverse effects transient cough (20%) pruritus and/or burning sensation of the nose