After obtaining Ethical Committee approval and informed consent, 110 patients American Society of Anesthesiologists score (ASA ) I-II undergoing knee replacement under spinal anesthesia were randomized to receive postoperative either lornoxicam (8 mg per os (PO) /12 hours (h) for 48 h) or etoricoxib (120mg PO/24 h for 48 h) both administered in the postoperative care unit, at the end of surgery.