This was a prospective randomized double blind study conducted in Himalayan Institute of Medical Sciences. The aim was to evaluate the onset time of sensory and motor block; time required for complete sensory and motor block; to assess the duration of analgesia, sensory and motor block; to observe the haemodynamic changes and observe for any side effect and complications. Total 75 adult patients of either sex, ASA stutus I- III, body weight > 50 kg and with no contraindication to peripheral nerve blocks were randomly divided into three equal Groups-A, B and C all patients underwent elective upper limb surgery. No premedication was given to any of the patients. Group A- lignocaine+bupivacaine Group B- A+buprenorphine Group C- A+ fentanyl . All the patients were given brachial plexus block by supraclavicular approach using nerve stimulator. Cardiorespiratory parameters and drug toxicity and side effects and complications were monitored. Conclusion: Success rate with the technique was 100% with no incidence of pneumothorax or other complications like horner''s syndrome, neurological deficit etc.