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Review Question - QID 108717

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QID 108717 (Type "108717" in App Search)
A 31-year-old male presents to the emergency room following an altercation with patrons at a local grocery store. He is acting aggressively toward hospital staff and appears to be speaking to non-existent individuals. On examination he is tachycardic and diaphoretic. Horizontal and vertical nystagmus is noted. The patient eventually admits to taking an illegal substance earlier in the evening. Which of the following mechanisms of action is most consistent with the substance this patient took?