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Zafirlukast
- Zafirlukast is used to prevent asthma symptoms. Zafirlukast is in a class of medications called leukotriene receptor antagonists (LTRAs). It works by blocking the action of certain natural substances that cause ...
- ... verapamil (Calan, Covera, Isoptin, Verelan); vitamin C; and zafirlukast (Accolate). Your doctor may need to change the ...