Zafirlukast (zafirlukast) — Uses, Dosage, Side Effects & Safety

Drug class: Leukotriene receptor antagonist (LTRA)

Overview

Zafirlukast is a prescription medication used to help prevent and control symptoms of asthma, such as wheezing and shortness of breath. It is not a rescue medicine and should not be used to treat sudden asthma attacks. Zafirlukast works by blocking leukotrienes, substances in the body that cause inflammation, swelling, and tightening of the airways. By reducing these effects, zafirlukast helps to keep the airways open and makes breathing easier. Key points for patients: Take zafirlukast regularly as prescribed, even if you feel well. It is important to continue other asthma medications unless your doctor tells you to stop. Always keep a rescue inhaler for emergencies, as zafirlukast is not suitable for acute asthma attacks.

Therapeutic uses

• Asthma prophylaxis
• Chronic asthma treatment
• Exercise-induced bronchoconstriction prevention

Common side effects

• Headache
• Nausea
• Diarrhea
• Abdominal pain
• Elevated liver enzymes
• Churg-Strauss syndrome
• Hypersensitivity reactions

Frequently Asked Questions about Zafirlukast

What is zafirlukast used for?

Zafirlukast is used to help prevent and control asthma symptoms. It is not a rescue medication and should not be used for sudden asthma attacks.

How does zafirlukast work?

Zafirlukast blocks leukotriene receptors in the lungs, reducing inflammation, swelling, and tightening of the airways to help prevent asthma symptoms.

Can I use zafirlukast during an asthma attack?

No, zafirlukast is not effective for treating acute asthma attacks. Always use your rescue inhaler for sudden symptoms.

What should I do if I miss a dose?

Take the missed dose as soon as you remember. If it’s almost time for your next dose, skip the missed dose and continue your regular schedule. Do not double up doses.

Are there any serious side effects?

Serious side effects include liver problems, severe allergic reactions, and rare immune system reactions. Seek medical help if you notice yellowing of the skin or eyes, severe abdominal pain, or difficulty breathing.

Can children take zafirlukast?

Yes, zafirlukast is approved for children 5 years and older. The dose for children is typically lower than for adults.

Can I stop taking zafirlukast if I feel better?

No, do not stop taking zafirlukast without consulting your doctor. Stopping suddenly may worsen your asthma symptoms.

Educational information only. Always consult a qualified healthcare professional before starting, stopping, or changing any medication.