18-year-old man presents with an unintentional methadone overdose. The patient's vitals are BP 90/40, RR 4, HR 54, and oxygen saturation 91%. He is given 0.4 mg of naloxone in the emergency department resulting in an awake patient with normal vital signs. What disposition is indicated for this patient?
a.Chest X-ray
b.Discharge
c.Intubation and mechanical ventilation
d.Observe for 6-8 hours