Zafirlukast is a leukotriene (loo-koe-TRY-een) inhibitor. Leukotrienes are chemicals your body releases when you breathe in an allergen (such as pollen). These chemicals cause swelling in your lungs and tightening of the muscles around your airways, which can result in asthma symptoms. Zafirlukast is used to for chronic treatment of asthma, and to prevent asthma attacks in adults and children as young as 5 years old. Do not give this medication to a child without a doctor's advice. Zafirlukast may also be used for purposes not listed in this medication guide.
Accolate is a medication that belongs to a class of drugs known as leukotriene receptor antagonists. It is used in treatment of asthma symptoms. It can also help improve lung function.