 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST] /redness. Follow these instructions while taking vandetanib and for 4 months after stopping treatment. Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products). This medication may cause wounds to heal slowly or poorly. Before having surgery, talk with your doctor about the risks and benefits of this medication. Your doctor may tell you to temporarily stop treatment with this medication at least 1 month before surgery. Ask your doctor for specific instructions about when to stop and when to restart treatment with vandetanib. Tell your doctor right away if you have wounds that are not healing well. Older adults may be more sensitive to the side effects of this drug, especially QT prolongation (see also Warning section). Since this drug can be absorbed through the skin and lungs and may harm an unborn baby, women who are pregnant or who may become pregnant should not handle this medication or breathe the dust from the tablets. Tell your doctor if you are pregnant or plan to become pregnant. You should not become pregnant while using vandetanib. Vandetanib may harm an unborn baby. Your doctor should order a pregnancy test before you start this medication. Ask about reliable forms of birth control </s>