Intravenous adjuvant can sedate the patient but if the same is given intrathecally, more benefit is achieved in terms of prolongation of block and effective analgesia along with sedation. Hence they can be used in surgeries of longer durations.The practice of adding adjuvants like opioids started in the 1970's. Morphine was the first opioid used for this purpose. There are numerous studies on the use of opioid as adjuvant with intrathecal local anaesthetic. A prospective randomized controlled study was conducted on 60 patients of physical status ASA I & II, aged 20-60 years of either sex posted for lower abdominal and lower limb surgeries at Hospital. Ethical committee clearance and written informed consent of the patients were obtained before proceeding with the study. There was statistically significant (p<0.001)difference between the two groups regarding onset of sensory block (time to reach T10) which is prolonged in Group Y (3.9±0.5477 min) when compared to Group X (3.267±0.4686 min). The mean time taken to attain maximum sensory level is (6.63±0.964 min) in Group X and (6.6±0.932 min) in Group Y. There was no statistically significant (p> 0.05) difference between the two groups in relation to time taken to attain maximum sensory level. Time for maximum motor block in Group X was (5.53±1.224 min) and in Group Y was (5.83±0.913 min). There was no significant difference between the two groups in relation to time taken to attain maximum motor block.