Objectives: RIVA (Regional Intravenous Anesthesia) is frequently preferred during distal upper extremity operations (hand, wrist and forearm) compared to general anesthesia because of the following reasons: lower operational cost, simplicity, surgical operation environment stability, quick implementation and faster recovery time. Deeper anesthesia, prolonged effective time, hemodynamic stabilization, reduced intraoperative complications and longer postoperative analgesia are aimed by using adjunct drugs. Main objective of our study is to investigate the effectiveness of magnesium as an adjunct in RIVA. Material & Methods:A set of 18-80 year old patients who were operated on upper extremity using RIVA at Istanbul University, Istanbul Medical Faculty, Department of Orthopedics between 2012 and 2013 were evaluated retrospectively for this study. Only adult subjects who are classified with ASA I and II preoperative physical condition were included. Patients were evaluated according to BMI (Body Mass Index), gender, ASA score, anesthesia success rate, hemodynamic stabilization, VAS (Visual Analogue Scale) score at 1st postoperative hour and for emergent adverse effects. Results: 40 RIVA patients were included in this study. 20 patients were anaesthetized using Magnesium (Group-M) and the other 20 patients were anaesthetized without using Magnesium (Group-K). No statistical differences were determined between the groups regarding demographic data. Comparison of hemodynamic parameters between Group-M and Group-K showed no significant difference (p<0,05). It is observed that VAS score comparisons do not indicate