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Introduction: Postoperative pain is one of the common causes of increased postoperative morbidity and delayed recovery. Pain causes adverse effects such as hypertension, tachycardia, myocardial ischaemia, decreased alveolar ventilation, poor wound healing, and postoperative morbidity. Vitamin C and N-acetylcysteine (NAC), which is a novel co-analgesic, are being studied to reduce postoperative pain and opioid consumption. Aim: To study the effect of intravenous Vitamin C and NAC on postoperative surgical pain and opioid consumption after laparoscopic gynaecologic oncosurgeries. Materials and Methods: The present study was a randomised controlled study conducted at the Department of Anaesthesiology, Kidwai Memorial Institute of Oncology, Bengaluru, Karnataka, India on 300 patients of American Society of Anaesthesiologists (ASA) physical status 1 and 2 scheduled for laparoscopic Gynaeconcology surgery after obtaining written informed consent. All the selected patients were randomly allocated into three groups. Group P was the control group in Group N patients received intravenous injections of NAC (50 mg/kg) and vitamin C infusion (50 mg/kg) in Group C. Patients were explained about the visual analogue pain scale preoperatively. In the postoperative period, VAS scores were recorded and noted along with the rescue analgesics received and side-effects. Results: Haemodynamic variables were comparable among all three groups. The number of patients who had VAS scores of more than 4 was lower in group C (Vitamin C) at various time intervals when compared to the NAC and placebo groups. It was also statistically significant at 45 minutes, 60 minutes, 90 minutes, 150 minutes, 180 minutes, 300 minutes, and 10 hours (p-value=0.014,

Treatment for pain syndromes is one of the most relevant areas of modern medicine, which is of high social, economic and, individual importance. One of the most difficult questions is therapy for chronic pain (CP). This therapy should be based on a thorough analysis of the causes of pain. It is necessary to use combinations of drugs that potentiate the analgesic effects of each other and have a low risk of complications. The concept of adjuvant analgesics as one of the promising areas of treatment for chronic kidney disease is discussed.