Effect of Prophylactic Ondansetron on Postoperative Nausea and Vomiting in Patients on Preoperative Steroids Undergoing Craniotomy for Supratentorial TumorsWig, Jyotsna MD*; Chandrashekharappa, Kiran Nagenahalli MD*; Yaddanapudi, Lakshmi Narayana DA, MD*; Nakra, Dhiraj MD* †; Mukherjee, Kanchan Kumar MCh†Journal of Neurosurgical Anesthesiology: October 2007 - Volume 19 - Issue 4 - p 239-242 doi: 10.1097/ANA.0b013e3181557471 Clinical Investigations Abstract Author Information The exact incidence of postoperative nausea and vomiting (PONV) in patients on steroids undergoing neurosurgical procedures is not known. This prospective randomized double-blind study was planned to know the efficacy of prophylactic ondansetron in the prevention of PONV in patients on steroids as compared with placebo. Seventy adult patients of either sex who had received preoperative steroids (dexamethasone) for at least 24 hours and were scheduled to undergo craniotomy for supratentorial tumors were included. Patients were randomly allocated using a randomization chart to 1 of the 2 groups to receive either ondansetron 4 mg (group O) or 0.9% saline (group S) intravenously at the time of dural closure. Numeric Rating Scale score for nausea and pain intensity was recorded preoperatively and till 24 hours postoperatively. The 6-hour postoperative nausea score was significantly lower in group O [median, 0; interquartile range (IQR), 0 to 20] than in group S (median, 20; IQR, 0 to 20) (P<0.05). The incidence of vomiting was lower in group O (23%) than in group S (46%) (P<0.05). The total number of emetic episodes, the number of doses of rescue antiemetics given in the first 6 postoperative hours, and the total number of rescue antiemetics given were significantly lower in group O than in group S (P<0.05). Intravenous administration of 4 mg of ondansetron at the time of dural closure was effective in reducing the incidence of PONV and the rescue antiemetics requirement in patients on preoperative steroids undergoing craniotomy for supratentorial tumors. *Department of Anaesthesia and Intensive Care †Department of Neurosurgery, Postgraduate Institute of Medical Education and Research, Chandigarh, India Reprints: Dr. Dhiraj Nakra, MD, Department of Anaesthesia and Intensive Care, Postgraduate Institute of Medical Education and Research, Chandigarh, India (e-mail: email@example.com). Received for publication October 18, 2006; accepted July 18, 2007 © 2007 Lippincott Williams & Wilkins, Inc.