Zafirlukast

Zafirlukast is used to treat the symptoms of chronic asthma and also prevent asthma attacks in children and adults. Zafirlukast reduces the swelling (inflammation) and narrowing of the airways, which can help make breathing easier. Zafirlukast works by blocking the action of certain natural substances called leukotrienes. Zafirlukast belongs to a class of medications called leukotriene receptor antagonists. Zafirlukast is not indicated for the primary treatment of an acute (sudden) asthma attack. This medicine may also be used to treat other conditions as determined by your doctor.