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: Psychiatry
[{'content': 'Akathesia is treated by all except - \nSelect and explain. \nA. Trihexyphenidyl, B. Diazepam, C. Haloperidol, D. Promethazine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Drugs used in Akathesia \n\nβ -blockers (propranolol, metoprolol)\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\nAntihistaminic (Diphenhydramine, Promethazine)\nVitamin B6\nCentral anticholinergics (e.g. Trihexyphenidyl)\nDiazepam\nAmantadine', 'role': 'assistant'}]