Displaying 7 results of Pirfenidone Impurities Pirfenidone is a medication used to treat idiopathic pulmonary fibrosis, a chronic lung disease. However, the drug may contain impurities that can affect its quality, purity, and safety. Pirfenidone impurities can be formed during the manufacturing process, storage, or transportation of the drug. These impurities can potentially cause adverse effects and compromise the drug's effectiveness. Therefore, it is crucial to monitor and control the levels of impurities in Pirfenidone to ensure its safety and efficacy.