Objective: To evaluate the efficacy of Intraperitonial instillation of 0.25% Bupivacaine versus intravenous Tramadol in providing postoperative analgesia for patients undergoing Caesarean section under spinal anaesthesia.Methods: A prospective, randomized controlled trial was conducted involving 60 patients who underwent elective Caesarean sections. Participants were divided into two groups: Group A received 0.25% Bupivacaine instilled into the wound site, and Group B received intravenous Tramadol postoperatively. Pain scores, opioid consumption, and side effects were monitored and compared between the two groups over a 24-hour period.Results: Both analgesic strategies provided effective postoperative pain relief, but differences in pain scores and side effects were noted. The Bupivacaine group reported significantly lower pain scores in the immediate postoperative period compared to the Tramadol group (p < 0.05). However, Tramadol was associated with fewer instances of local adverse effects and provided a more sustained analgesic effect throughout the 24-hour period (p < 0.05).Conclusion: Intraperitonial instillation of 0.25% Bupivacaine and intravenous Tramadol are both effective for postoperative analgesia in Caesarean sections under spinal anaesthesia. Bupivacaine offers superior immediate pain relief, while Tramadol provides extended analgesia with fewer local side effects. The choice of analgesic method should be tailored to the patient’s needs and surgical context.