Displaying 14 results of Furosemide Impurities Furosemide is a diuretic medication used to treat fluid retention and hypertension. However, during the manufacturing process, impurities can be formed which may affect the quality and efficacy of the drug. These impurities can include degradation products, starting materials, and reaction intermediates. It is important to monitor and control these impurities to ensure the safety and effectiveness of furosemide for patients.