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
False regarding opiate withdrawal syndrome - 
Select and explain. 
A. Characterized by body pain, B. Characterized by dilatation of pupils, C. Treated with naltrexone, D. Treated with methadone
C: Treated with naltrexone
Answer: C: Treated with naltrexone 
Explanation: Here I would like to clear all the confusion regarding the use of naltrexone in opioid withdrawal.
Though naltrexone can be given during treatment of opioid withdrawal (detoxification), It is not given to treat the symptoms of withdrawal syndrome, rather it is given to precipitate the symptoms of withdrawal syndrome, which are prevented and treated by addition of clonidine. By this method, more rapid detoxification occurs.