 The postoperative analgesia will be documented using the visual analog score 0no pain, 10worst pain. In addition, total opioid dose over the 48-h study period will be documented. Postoperative nausea will be measured using a categorical scoring system none0, mild1, moderate2, severe3 and episodes of vomiting will be documented. Rescue antiemetics will be given to any patient who complains of nausea andor vomiting. All variables will be assessed at 2, 6, 12, 24, and 48 hours, postoperatively by an investigator blinded to group allocation. 