Supraclavicular approach of brachial plexus block has been popular technique in delivery of anesthesia in patients undergoing upper limb surgeries. Of various local anesthetics, bupivacaine is used most frequently for brachial plexus block. Any adjuvant to the local anesthetics for brachial plexus block prolongs its analgesic effect. Hence the present study was undertaken to compare the effect of dexmedetomidine and fentanyl as adjuvant to bupivacaine in supraclavicular nerve block for upper limb surgeries.