This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
[{'content': 'A patient with drug overdose presents with pin-point pupils, with BP 80/60 mm Hg, pulse 60 bpm with shallow respiration. Which of the following will be used for treatment immediately? \nSelect and explain. \nA. Naloxone, B. Naltrexone, C. Methadone, D. Pentazocine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: (A) Naloxone # Typical syndrome, which includes shallow and slow respirations, pupillary miosis (with mydriasis once brain anoxia develops), bradycardia, hypothermia, and stupor or coma is seen in Opioid Toxicity and Overdosage.> If not treated rapidly, respiratory depression, cardiorespiratory arrest, and death can ensue.> The first step in managing overdose is to support vital signs, using intubation if needed. Definitive treatment is the administration of a narcotic antagonist such as 0.4 mg to 2 mg intravenous or intramuscular naloxone.', 'role': 'assistant'}]