NSAIDs are widely used compounds in the management of several acute and chronic pain syndromes. NSAIDs induce their action by blocking the cyclooxygenase enzymes, cox-1 and cox-2, during the conversion of arachidonic acid to prostaglandins. Conventional NSAIDs inhibit both cox isoforms and are therefore at risk of serious complications as gastrointestinal irritation, postoperative bleeding, renal failure, water and sodium retention and hepatic failure.