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': 'Not true about Naltrexone \nSelect and explain. \nA. Parenterally administered, B. Used to prevent relapse of heavy drinking, C. Long acting, D. Cause hepatotoxicity', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Parenterally administered Naltrexone (antagonist on all opioid receptors) o More potent than naloxone. It can be given orally It is used as a maintenance drug for opioid addicts - opioid blockade therapy ofpostaddict. o It is also used to decrease craving in chronic alcoholism. o The most impoant side effect is hepatotoxicity.", 'role': 'assistant'}]