Aim: To compare prophylactic use of I/V Tramadol, I/V Dexmedetomidine for prevention of shivering after Spinal Anaesthesia. Material and Methods: The present placebo controlled prospective randomised comparative study was conducted in the Department of Anaesthesiology and Intensive Care over a period of twelve months after approval of the research review board. 90 patients of either gender belonging to ASA grade I and ASA II undergoing elective lower limb or lower abdominal surgery under spinal anaesthesia, after considering the inclusion and exclusion criteria were included. In the intra-operative and post-operative period Haemodynamic parameters like heart rate, systolic blood pressure, diastolic blood pressure, mean arterial pressure, arterial oxygen saturation, perioperative nausea, vomiting and itching was assessed. Grading of shivering and sedation was also assessed. Results: MAP was statistically significantly low in Group C when compared to Group T and Group D after 5 mins of Spinal anaesthesia till 120 min (p<0.01).The incidence of shivering in Group T was 36.67%, Group D was 10% and Group C was 53.33%. Hence shivering was found to be maximum in group C while minimum in group D. Sedation score was found to be maximum in group D followed by group T and C. Conclusion: We conclude that Dexmedetomidine is effective and comparably superior than tramadol in preventing shivering after spinal anaesthesia. Dexmedetomidine has quicker onset and also provides sedation without respiratory depression. Though with its use a fall in blood pressure and heart rate is foreseen.