Accolate Zafirlukast tablets What does zafirlukast do?ZAFIRLUKAST (Accolate(R)) 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.