This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous system, Subject name: Pharmacology
[{'content': 'The drug not used for analgesia in a patient of head injury is: \nSelect and explain. \nA. Morphine, B. NSAIDs, C. Rofecoxib, D. Acetaminophen', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ref: KDT 6/e p457 Morphine is contra-indicated in a patient with headband injury. Relative contraindications to morphine include: respiratory depression when appropriate equipment is not available Although it has previously been thought that morphine was contraindicated in acute pancreatitis, a review of the literature shows no evidence for this', 'role': 'assistant'}]