Imipenem Impurities are the unwanted substances that are present in the drug Imipenem. These impurities can affect the quality, purity, and safety of the drug, and can have harmful effects on the patient's health. It is important to identify and control these impurities to ensure the drug's effectiveness and safety. Various analytical methods are used to detect and quantify these impurities, and strict regulations are in place to limit their levels in the drug.