Pirfenidone (pirfenidone) — Uses, Dosage, Side Effects & Safety

Drug class: Antifibrotic agent

Overview

Pirfenidone is a prescription medication used to treat idiopathic pulmonary fibrosis (IPF), a chronic and progressive lung disease that causes scarring of lung tissue. By slowing the buildup of scar tissue, pirfenidone helps preserve lung function and may improve quality of life for people with IPF. Pirfenidone works by reducing inflammation and blocking the activity of certain substances in the body that contribute to fibrosis (scarring). It is not a cure for IPF, but it can help slow the progression of the disease. Key points for patients: Take pirfenidone exactly as prescribed, usually with food to reduce stomach upset. Regular blood tests are needed to monitor liver function. Protect your skin from sunlight, as pirfenidone can increase sensitivity to the sun.

Therapeutic uses

  • Idiopathic pulmonary fibrosis
  • Progressive fibrosing interstitial lung diseases

Common side effects

  • Nausea
  • Diarrhea
  • Photosensitivity reaction
  • Rash
  • Fatigue
  • Insomnia
  • Liver enzyme elevations

Frequently Asked Questions about Pirfenidone

What is pirfenidone used for?

Pirfenidone is used to treat idiopathic pulmonary fibrosis (IPF), a lung disease that causes scarring and reduces lung function.

How does pirfenidone work?

Pirfenidone works by reducing inflammation and slowing the formation of scar tissue (fibrosis) in the lungs.

What should I do if I miss a dose?

Take the missed dose as soon as you remember, unless it is almost time for your next dose. Do not double up doses.

Can pirfenidone cure pulmonary fibrosis?

No, pirfenidone does not cure IPF, but it can help slow the progression of the disease and preserve lung function.

What are the most common side effects?

Common side effects include nausea, diarrhea, loss of appetite, rash, and sensitivity to sunlight.

Is pirfenidone safe during pregnancy or breastfeeding?

Pirfenidone is not recommended during pregnancy or breastfeeding due to limited safety data. Discuss risks and benefits with your doctor.

How long do I need to take pirfenidone?

Pirfenidone is usually taken long-term as prescribed by your doctor, as long as it is effective and well-tolerated.

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