 <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]  and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval. Many drugs besides vandetanib may affect the heart rhythm (QT prolongation), including amiodarone, chloroquine, disopyramide, dofetilide, granisetron, haloperidol, methadone, moxifloxacin, pimozide, procainamide, sotalol, macrolide antibiotics (such as clarithromycin), among others. Other medications can affect the removal of vandetanib from your body, which may affect how vandetanib works. Examples include dexamethasone, St. John's wort, rifamycins (such as rifabutin, rifampin), drugs used to treat seizures (such as carbamazepine, phenytoin, phenobarbital, primidone), among others. Does Caprelsa interact with other drugs you are taking? Enter your medication into the WebMD interaction checker Check InteractionThe overdose of Caprelsa Oral: If someone has overdosed and has serious symptoms such as passing out or </s>