MSFinals-0893

A 19-year-old male is brought to the Emergency department by a group of individuals who quickly leave before medical staff can speak with them. The patient is barely conscious, with a respiratory rate of 8/min, blood pressure of 120/70 mmHg, and a pulse of 60 bpm. Needle track marks are visible on his arms, and his pupils are constricted. What is the first treatment you would provide?