Zafirlukast treats asthma. Take this medication on an empty stomach at least 1 hour before or 2 hours after a meal.

Zafirlukast Overview

Reviewed: September 30, 2013

Zafirlukast is a prescription medication used to prevent asthma attacks. This medication belongs to a group of drugs called leukotriene receptor antagonists. It works by blocking the actions of leukotriene, a natural substance that causes swelling and tightening of the airways.

Zafirlukast comes in tablet form. It is usually taken twice daily on an empty stomach, 1 hour before, or 2 hours after a meal.

Common side effects include headache, nausea, and loss of appetite.

Patient Ratings for Zafirlukast

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Uses of Zafirlukast

Zafirlukast is a prescription medication used to prevent asthma attacks in adults and children 5 years of age and older with chronic asthma.

This medication may be prescribed for other uses. Ask your doctor or pharmacist for more information.

Zafirlukast Brand Names

Zafirlukast may be found in some form under the following brand names:

Zafirlukast Drug Class

Zafirlukast is part of the drug class:

Side Effects of Zafirlukast

Common side effects include:

  • headache
  • infection
  • nausea
  • diarrhea
  • pain

This is not a complete list of zafirlukast side effects. Ask your doctor or pharmacist for more information.

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.