Displaying 1 results of Vandetanib Impurities Vandetanib is a medication used to treat certain types of cancer. However, the drug may contain impurities that can potentially cause harm to the patient. Vandetanib impurities refer to any unwanted substances found in the drug that are not the active ingredient. These impurities must be closely monitored and controlled to ensure the safety and efficacy of the medication. Regulatory agencies such as the FDA have strict guidelines on the levels of impurities allowed in drugs, including Vandetanib.