Pirfenidone is used to treat a certain lung disease called idiopathic pulmonary fibrosis (IPF). This disease causes the lungs to get scarred and become stiff, making it hard to breathe. Pirfenidone may help slow down the worsening of your IPF.


Tiredness, lack of energy, loss of appetite, weight loss, or changes in taste may occur. Dizzinessnauseaupset stomachvomitingdiarrhea, or heartburn may also occur but taking pirfenidone with food may lessen these side effects. If any of these effects persist or worsen, tell your doctor or pharmacist promptly

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