This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
[{'content': 'All of the following drugs are used in prophylaxis of migraine, except: \nSelect and explain. \nA. Propanolol, B. Flunarizine, C. Tapiramate, D. Levetiracetam', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Drugs approved by the FDA for migraine prophylaxis are propranolol, timolol, sodium valproate and methysergide. Other used drugs are amitriptyline, noriptyline, verapamil, phenelzine, gabapentine and cyproheptadine. Ref: Harrisons 16th Edition, Page 93 (table 14-11)', 'role': 'assistant'}]