17-year-old boy is brought to the emergency department by his friends. They were at a house party and found their friend unconscious after he ingested an unknown substance. On physical exam, vital signs are temp 96F, heart rate 50, respiratory rate of 4, and oxygen saturation 92% on room air. The boys pupils are miotic. On lung auscultation, there are crackles bilaterally. You administer supplemental oxygen. What is the most appropriate clinical intervention