During your assessment of a 50-year-old male who was found u…
During your assessment of a 50-year-old male who was found unresponsive in an alley, you note that he has slow, shallow respirations; bradycardia; facial cyanosis; and pinpoint pupils. As your partner begins assisting the patient’s ventilations, he directs your attention to the patient’s arms, which have multiple needle tracks on them. Which of the following would most likely explain the patient’s presentation?