Surgery General eac55df6 Which one of the opioid has maximum plasma protein binding capacity: A Morphine B Sufentanil C Fentanyl D Pethidine High-Yield Explanation Protein binding capacity of opioids: Morphine: 30-40%., Pethidine: 70%, Fentanyl: 84%. Alfentanil: 92%., Sufentanil: 93%.