Metronidazole impurities refer to any unwanted substances that may be present in Metronidazole drug products during manufacturing, storage or transportation. These impurities have the potential to affect the quality, safety and efficacy of the drug product. Therefore, it is necessary to identify, quantify and control these impurities to ensure that the drug product meets the required standards and regulatory requirements. Metronidazole impurities can be monitored using various analytical techniques, such as high-performance liquid chromatography (HPLC) or gas chromatography (GC).