Displaying 5 results of Pentoxifylline Impurities Pentoxifylline is a medication used to improve blood flow in patients with peripheral vascular disease. However, during the manufacturing process, impurities can be introduced into the final product. These impurities can potentially cause adverse effects and reduce the efficacy of the medication. Therefore, it is important to monitor and control the levels of impurities in pentoxifylline to ensure its safety and effectiveness.