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Background: The brachial plexus block is an easy and relatively safe procedure for upper limb surgeriesthough there are different approaches to it, it is a block of roots, divisions and cords of the brachial plexus,out of which supraclavicular approach is most widely used method for anaesthesia and preoperative painmanagement in surgery below shoulder joint. It is performed at the trunk level where the plexus is presentedmost compactly. Another advantage is that it can be performed with the patient’s arm in any position toprovide excellent anaesthesia for elbow, forearm and hand surgery.Various local anaesthetic agents are used for Brachial Plexus Block but most commonly used drugs are;Bupivacaine, and Lignocaine. Bupivacaine is long acting whereas Lignocaine is short acting drug. Noveladjuncts studied to date include butorphanol, buperonorphine, dexamethasone, Clonidine, Neostigmine,Tramadol, Midazolam, Dexmedetomidine etc.Dexmedetomidine is an anxiolytic sedative and analgesic agent, it is a selectivea2 – adrenoreceptor agonistand is approximately 8 times more potent than clonidine. It was superior to clonidine also in quality foranesthesia in tourniquet tolerance, and postoperative analgesia and it is notable for its ability to providesedation without risk of respiratory depression and can provide cooperative or semi arousable sedation.The mechanism by which a2 adrenergic receptor agonists produce analgesia is likely to be multifactorial.Peripherally a2 adrenergic agonists produce analgesia by reducing the release of norepinephrine anda2 receptor independent inhibitory effect on nerve fibre action potential.Recent pre-clinical and clinical studies show that the glucocorticoid dexamethasone appears to beeffective as adjuvant to local anesthetics since it posses anti-inflammatory and analgesic properties. Inaddition, perineural injection of steroid does influence post operative analgesia. This study was done tocompare the adjuvant effect of

Efficacy of dexamethasone vs dexmedetomidine as an adjuvant for brachial plexus block- A randomised control trial