Review Question - QID 215129

A 38-year-old man is brought to the emergency department by ambulance after he was found down in the street. On presentation, he is somnolent and barely arousable even by sternal rub. He cannot provide a coherent history and cannot provide information for any recent contacts. His past medical history is significant for multiple substance use disorders. On presentation, his temperature is 96°F (35.6°C), blood pressure is 105/56 mmHg, pulse is 57/min, and respirations are 7/min. A urine toxicology study is conducted, and treatment is given based on the results of this study. During the administration of this treatment, the patient begins rhythmically contracting his extremities and bites his tongue. Which of the following agents was most likely given to this patient?