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: Pharmacology
[{'content': 'Drugs indicated in drug induced vomiting are all except: March 2012 \nSelect and explain. \nA. Metoclopramide, B. Hyoscine, C. Ondansteron, D. Chlorpromazine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans: B i.e. Hyoscine Anti-emetic drugs Metoclopramide is an effective and popular drug for many types of vomiting - postoperative, drug induced, disease associated (migraine), radiation sickness, etc. Hyoscine is the most effective antiemetic drug for motion sickness and is not effective in vomiting of other etiologies Ondansetron belongs to a new class of antiemetic drugs developed to control cancer chemotherapy/radiotherapy induced vomiting Neuroleptics/antipsychotics have broad spectrum antiemetic action effective in drug induced and post-anaesthetic nausea and vomiting etc.', 'role': 'assistant'}]