Management of acute post-operative pain has received keen attention in recent years with considerable concurrent advancement in the field. Major abdominal surgeries with upper abdominal incisions lead to severe abdominal pain, which if treated inadequately, can cause shallow breathing, atelectasis, retention of secretions and lack of cooperation in physiotherapy. This increases the incidence of post-operative morbidity and leads to delayed recovery. The choice of post-operative analgesic modality employed after major abdominal surgeries at our university hospital is at the discretion of the primary anesthesiologist responsible for managing the patient in the operating room. The choice mainly depends upon the strategy favored by the concerned anesthesiologist and the availability of drugs and equipment. The supply of drugs is erratic and the quantity of equipment might not be sufficient for every patient. With these objectives in mind and in this era of opioid free analgesia, we designed this prospective observational study to evaluate postoperative pain in patients undergoing upper abdominal surgery with local anaesthetics bupivacaine and ropivacaine with NMDA adjuvant; magnesium sulphate.