Seventy American Society of Anesthesiologist (ASA) physical class I-II, age 18-60 years patients scheduled for laparoscopic surgery were included in this study. Anesthesia was induced with propofol, fentanyl, and rocuronium, and maintained with sevoflurane in oxygen / air mixture in all patients. Remifentanil was continuously infused during surgery. Patients were randomly divided into two groups. Patients in the dexamethasone and aprepitant group (group DA, n=35) received 40 mg aprepitant orally 1 to 2 hours before induction of anesthesia and 2 ml saline intravenous (iv) within the last 30 minutes of surgery. Patients in the dexamethasone and ondansetron group (group DO, n=35) received an oral placebo identical to aprepitant 1 to 2 hours before induction of anesthesia and 4 mg ondansetron iv within the last 30 minutes of surgery. All patient received iv 8 mg dexamethasone after induction of anesthesia.