Evaluation of clonidine as an adjuvant to brachial plexus block and its comparison with tramadol.

Background And Aims: It has been reported that clonidine when used as an additive in a dose of 90 μg in adults increases the duration of peripheral nerve blocks. Hence, this study was conducted to evaluate the effect of clonidine in brachial plexus blocks and to compare it with tramadol.

Material And Methods: Ninety patients posted for upper limb orthopedic surgery were divided randomly into three groups.