Intraoperative hypotension is common side effect of general anaesthesia. It has a multifactorial aetiology and associates with increased mortality, stroke, cardiac morbidity, acute kidney injury, and delirium. Even mild hypotension is potentially deleterious. As the blood pressure threshold decreases, the risk of injury increases, and appears to occur with a much shorter duration.Maintenance of adequate BP and organ perfusion is, therefore, a key priority in the perioperative period. Current strategies include intravenous (IV) fluids and vasopressors. Norepinephrine, a mixed α1 and β1-adrenergic agonist, offers a favourable pharmacological profile to maintain BP in the perioperative setting. Thus, administration of norepinephrine may provide an effective strategy to safely achieve and maintain BP thresholds and prevent or attenuate hypotension in the intra- and postoperative period.The sequential organ failure assessment (SOFA) score is a simple and objective scoring system that represents degree and progression of dysfunction with a four-point assessment for each of the six organ systems (central nervous system, cardiovascular system, respiratory system, renal system, liver and coagulation). This assessment was initially developed to describe and quantify organ function and has been validated in various clinical situations. An increase in the SOFA score during ICU treatment has also been associated with progressive organ failure and increased mortality in various clinical settings . Perioperative administration of vasoactive drugs may reduce postoperative complications and hospital length of stay in adult patients having major abdominal surgery and length of hospital stay.In this study, We aim to determine the association between the mean SOFA score for 7 days and postoperative outcomes in patients who have early administration of noradrenaline for intraoperative hypotension during major abdominal surgery.