A 58-year-old man with chronic kidney disease (eGFR 28 mL/min/1.73m²) and hypertension is undergoing elective hip arthroplasty under general anesthesia. After induction with propofol and fentanyl, vecuronium 0.1 mg/kg is administered for intubation. Intraoperatively, neuromuscular monitoring shows train-of-four (TOF) ratio of 0.15 at 90 minutes post-administration. At the end of surgery (150 minutes post-vecuronium), TOF ratio remains 0.20. The anesthesiologist plans to reverse the blockade. Which agent is CONTRAINDICATED in this patient?