Zafirlukast is an oral leukotriene receptor antagonist (LTRA) for the maintenance treatment of asthma. Available as a tablet, it blocks the action of leukotriene C4 on its receptors, thus reducing constriction of the airways, build-up of mucus in the lungs and inflammation of the breathing passages.

GoldBamboo

... ZAFIRLUKAST (Accolate®) helps to reduce asthma symptoms (coughing, wheezing, shortness of breath, or chest tightness) and control your asthma. It does not provide instant relief and cannot be used to treat a sudden asthma attack. It works only when used on a regular basis to help reduce inflammation and prevent asthma attacks. Zafirlukast is effective in adults and older children. Generic zafirlukast tablets are not yet available. ...
Drug Digest - more...

Zafirlukast Systematic (IUPAC) name cyclopentyl N-[3-{[2- ...
Wikipedia - [full article]

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