Displaying 1 results of Fenspiride Hydrochloride Impurities Fenspiride Hydrochloride is a medication used to treat respiratory conditions. However, the drug may contain certain impurities that can potentially affect its effectiveness and safety. These impurities may include residual solvents, heavy metals, and other organic compounds. It is important to monitor and control these impurities during the drug manufacturing process to ensure the highest level of quality and safety for patients.