ENA-001 for Post Operative Respiratory Depression (PORD)

ENA-001 will be prepared in Ringer's lactate solution. A loading dose will be administered for 20 minutes followed by continuous infusion until the patient meets the criteria for PACU discharge (≥ 9 Aldrete score) or ABG reveals PaCO2 \< 30 mmHg with pH in the normal range. ENA-001 is for IV injection ready for use per subject by the investigational pharmacy, according to the randomization schedule.