Naloxegol impurities are substances that are present in naloxegol drug products but are not intended to be there. These impurities can affect the quality, safety, and efficacy of the drug. It is important to identify and control these impurities to ensure the drug is safe and effective for patients. The main impurities in naloxegol include related compounds, degradation products, and residual solvents. Analytical methods are used to detect and quantify these impurities during drug development and manufacturing.