Molsidomine is a drug used to treat angina pectoris and heart failure. However, the drug may contain impurities that can affect its safety and efficacy. These impurities may arise during the manufacturing process or storage of the drug. The identification and control of these impurities are critical to ensure the quality and safety of the drug. The most common impurities found in Molsidomine include related substances, degradation products, and solvent residues.