There are at least two essential requirements of preemptive analgesia i.e. anadequate antinociceptive preoperative intervention and that the nociceptive inputshould be blocked well into the postoperative period In recent years ,greateremphasis has been placed on pain as an important health problem. pain relief aftersurgery continues to be a major medical challenge and update studies continue toreport that postoperative pain management is not satisfactory. Evidence suggeststhat inadequate relief of postoperative pain may result in harmful physiologic andpsychological consequences that lead to significant morbidity which may delayrecovery.