This is a forthcoming randomized control clinical trial.We pointed tocompare between intrathecal hyperbaric bupivacaine alone versusintrathecal hyperbaric bupivacainein formation with one or the other fentanyl; or nalbuphinein 3 distinct portions (0.2 mg, 0.4mg, 0.8 mg).The study was done on 100 grown-up patients planned for elective lower stomach medical procedures under spinal sedation were randomlyallocated to 1 of the accompanying five gatherings to get intrathecally: 15 mg bupivacaine 0.5% alone (control);bupivacaine 15 mg joined with either 25 μg fentanyl; or nalbuphine 0.2,0.4 and 0.8 mg. Segment information, ASA characterization, length of medical procedure, kind of medical procedure, intra-employable Hemodynamic boundaries as the circulatory strain, the pulse and respiratory misery (respiratory rate, oxygen immersion), results as shuddering, sickness and regurgitating, and pruritis, beginning of engine and tactile square, most elevated level of tangible square, span of engine and tangible square, likewise postoperative pulse, non-intrusive pulse, oxygen immersion, torment score visual simple scale, results, term of viable absense of pain, all out number of salvage analgesics in first 24 hours were recorded. The outcome indicated that Both intrathecal nalbuphine and fentayl were viable in giving intra-employable and post-usable hemodynamic solidness, improving the time of postoperative complete and compelling absense of pain yet fentanyl was in a way that is better than nalbuphine in spreading beginning of tactile square, However, nalbuphine 0.8 mg is the best in expanding the time of postoperative complete and successful absense of pain, reducing the need of postoperative salvage pain relieving drugs and has better highlights, for example, hostile to pruritic, lesser shuddering, sickness and retching. Our decision is that nalbuphine 0.8 milligram is protected, significant and the best among the gatherings.