A 20 year-old man is brought into the emergency department by his girlfriend. The patient has been unconscious for over twenty minutes. The patient went to a rave party last night and came home in a drunken state. His girlfriend was not able to give any details on what he drank or what he ate at the party. Now, the patient is not communicating. He barely opens his eyes upon painful stimuli. His temperature is 97 ⁰ F, heart rate is 58 beats per minute, respiratory rate is 7 breaths per minute, and blood pressure is 80/55 mm Hg. His heart and lung examinations are unremarkable. Abdomen is nontender with hypoactive bowel sounds. Pupils react to light but constricted and sluggish. Which of the following is the next best step in the management of this patient, after you checked his airway, breathing and circulation?
