Tonsillectomy is one of the most common pediatric surgical procedures in the United States. Postoperative pain is substantial, with typical regimens employing narcotic derivatives and acetaminophen for 1-2 weeks after surgery. Recent enthusiasm for use of ibuprofen as an alternative has been tempered by equivocal data on its relative safety in regard to risk of postoperative hemorrhage. The primary objective is to evaluate efficacy of celecoxib for pain control after tonsillectomy in children. The secondary objective is to assess safety in regard to postoperative hemorrhage and adverse events.