 Patients will remain in the clinic for up to 4 hours after surgery to monitor pain and drug side effects while the anesthetic wears off. During this time, they will complete pain questionnaires every 20 minutes. Patients whose pain is unrelieved an hour after surgery may request and receive acetaminophen Tylenol and codeine. The tubing then will be removed and they will be discharged with pain medicines Tylenol, codeine and the study drug and forms to record pain ratings. They will be given detailed instructions on how and when to take the medicines and how to record information in the pain diary. 