Postoperative pain has been concerned in the past few years by both the anesthesiologists ans the surgeons. COX2-inhibitors have played an important roles in postoperative pain with minimal side effects.~Comparison(s): There is a difference in postoperative morphine consumption in the first 24 hours after thyroidectomy between patients who received celecoxib and placebo.
The purpose of this study is to determine whether celecoxib is effective in the treatment postoperative pain after thyroidectomy.~The research hypothesis:~There is a difference in postoperative morphine consumption in the first 24 hours after thyroidectomy between patients who received celecoxib or placebo.