Introduction: The supraclavicular brachial plexus is one among the most popular regional nerve blocks performed. The easy and predictable landmarks make it a popular approach. The advantages are –It provides long lasting post operative analgesia, there by reducing the systemic analgesic requirement; it aids in early ambulation, overcoming the disadvantages of general anaesthesia. Methodology: 60 patients undergoing upper limb surgery lasting more than thirty minute were included in the study. The elective surgical interventions were internal fixation of bones with plates and screws, excision of bone cysts, reconstructive and other surgeries involving upper limb Results: Onset of sensory blockade (time between injection and total abolition of pinprick response) was 20.47+/­3.64 min in group A and 19.49+/­4.90 min in group B. However there was no significant change in time of onset (p=0.373). Duration of sensory blockade (the time between injection and complete recovery from sensory disturbance) was comparable in both groups (group A 385.67+/­66.67 min, group B 380.50+/­80.15 min) without any statistical significance (p=0.787). Conclusion: There was no statistical significance in terms of onset, durations of surgery, sensory blockade and motor blockade between the two groups However the average duration of analgesia were 14.13+/­8.41 hrs and 22.18.+/­12.13 hrs in groups A and B respectively, showed statistical significance.