BACKGROUND AND OBJECTIVES: Intravenous regional anaesthesia with conventional large dose of localanaesthetic is associated with serious systemic toxicity when the tourniquet deflates unexpectedly during the procedure or when it is deflated intentionally at the end of surgery. Therefore modifications in IVRA have been done with the use of low dose of local anaesthetic to decrease systemic toxicity and addition of muscle relaxant and opioid to local anaesthetic to get the same quality analgesia as high dose local anaesthetic. Hence the present study is carried out to compare the sensory and motor characteristics, and side-effects during intra- operative and post-operative period between the patients who received 0.5% lignocaine alone and those who received combination of 40 ml of 0.25% lignocaine with 1 mg butorphanol and 2mg atracurium in intravenous regional anaesthesia for upper limb surgeries . AIM: 1 . TO COMPARE THE SENSORY AND MOTOR CHARACTERISTICS IN INTRAVENOUS REGIONAL ANAESTHESIA IN BOTH THE GROUPS 2. TO COMPARE THE SYSTEMIC SIDE EFFECTS IN THE TWO GROUPS. METHOD: 60 ASA class 1 and 2 patients scheduled for elective upper limb surgeries were randomly allocated to receive IVRA either with 40ml of 0.5% lignocaine alone (Group A, n = 30) or combination of 40 ml of 0.25% lignocaine with 1 mg butorphanol and 2 mg atracurium (Group B, n = 30). The sensory and motor characteristics, cardiovascular & respiratory parameters and side effects were studied during the intra-operative and post-operative period. RESULT: The time of onset of sensory loss & motor block ,the time of complete sensory block, and the time of complete motor block were significantly delayed in group B. But the quality of analgesia was similar in both groups after 10-15 minutes of the injection of anaesthetic solution. There was no significant difference between two groups in the time of return of full motor power and full sensation There was no significant difference in cardiovascular & respiratory parameters and incidence of side effects between the two groups. CONCLUSION: The study indicated that the triple combination of 40 ml of 0.25% lignocaine, 1mg butorphanol and 2mg atracurium produces the same quality of analgesia as 40ml of 0.5% lignocaine in IVRA. Thus, this modified technique of intravenous regional anaesthesia allows a reduction in the dose of local anaesthetic agent thus reducing the potential toxicity of the local anaesthetic agent.