PIRFENIDONE treats pulmonary fibrosis, a condition that causes the lungs to
scar and stiffen, making it hard to breathe. It works by preventing changes to the lung tissue. This delays worsening symptoms. Get Pirfenidone for as low as $463.13, which is 96% off the average retail price of $11,004.72 for the most common version, by using a GoodRx coupon.