Pirfenidone 200 mg is an anti-fibrotic medication primarily used for the treatment of Idiopathic Pulmonary Fibrosis (IPF), a chronic lung disease that causes progressive scarring of lung tissue. Pirfenidone works by reducing fibrosis (scarring), inflammation, and tissue damage in the lungs, thereby helping to slow down the progression of the disease. By limiting the build-up of fibrous tissue, it helps maintain lung function, improve breathing capacity, and delay disease progression in patients suffering from pulmonary fibrosis. It is usually taken under strict medical supervision as part of long-term management of fibrotic lung conditions.