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: Unknown
[{'content': 'A 50-year-old man is brought to the emergency department by ambulance. His respirations are shallow and infrequent, his pupils are constricted, and he is stuporous. He was noted to have suffered a grandmal seizure in the ambulance. Which of the following drugs is this man likely to have overdosed on? \nSelect and explain. \nA. Cocaine, B. LSD, C. Meperidine, D. PCP', 'role': 'user'}, {'content': "Answer: C \nExplanation: Severe opiate intoxication is associated with respiratory depression, stupor or coma, and sometimes pulmonary edema. Less severe intoxication is associated with slurred speech; drowsiness, and impaired memory or attention. Early on, the pupils are constricted, but they dilate if the patient becomes 'anoxic due to the respiratory depression. BP is typically. Meperidine intoxication in a chronic user is often complicated by delirium or seizures due to the accumulation of nor meperidine, a toxic metabolite with cerebral irritant properties.", 'role': 'assistant'}]