Effectiveness of Nalbuphine as an Adjuvant to Subarachnoid Block on Postoperative Analgesia in TURP Surgery

This study aims to evaluate the efficacy and side effects of nalbuphine, with the goal of providing anesthesiologists with evidence-based guidance for selecting the most appropriate pharmacological agents for their patients. Participants will be given a combination of nalbuphine and local anesthetic when getting a spinal block. Researchers will compare control group, given look-alike solution that contains no active drug to see if nalbuphine will better provide pain relief after surgery.