A 22-year-old man is brought by friends to the emergency department after taking multiple unknown pills at a party. He is drowsy but arousable, with stable vital signs. Which initial step in management is most appropriate?AObtain a focused history, assess airway, breathing, and circulation, check point-of-care glucose, and perform a brief targeted examinationBSend him for immediate CT head without assessmentCGive naloxone, flumazenil, and physostigmine empiricallyDDischarge him to his friends once he appears calmerEStart haemodialysis immediatelyCheck my answer