Glycopyrronium impurities are unwanted substances that can be present in pharmaceutical formulations containing glycopyrronium. These impurities can negatively affect the efficacy and safety of the medication, and may be introduced during the manufacturing process or from the starting materials. It is important to identify and control these impurities to ensure the quality and purity of the final product. Various analytical methods can be used to detect and quantify glycopyrronium impurities, including chromatography and spectroscopy.