Comparison of Duration of Analgesic Comparison of Duration of Analgesic Effect of Nalbuphine and Morphine as an Adjuvant to Bupivacaine in the Supraclavicular Block under Ultrasound Guidance.

Background: Although many studies are available in the literature that has analyzed the effects of morphine, nalbuphine, and other opioids, no study had compared the effects of nalbuphine versus morphine as an adjuvant to bupivacaine in the supraclavicular block under the guidance of ultrasound.

Methodology: A randomized, double-blinded, prospective study was carried out on 60 patients of the American Society of Anesthesiologists Class I and II who were undergoing upper limb surgeries under the supraclavicular block. Patients were randomly allocated into two groups ( = 30).