BACKGROUNDPeripheral nerve block as an anaesthetic technique plays an important role in modern regional anaesthesia compared with general anaesthesia which includes excellent pain control, shortened stay in post anaesthetic care unit and reduced side effects. 1,2 Upper limb surgeries are mostly performed under brachial plexus block. In this prospective, randomised, double-blind comparative study, we evaluated the effectiveness of the addition of dexmedetomidine to 0.5% levobupivacaine in ultrasound-guided supraclavicular brachial plexus block for upper limb orthopaedic surgeries.