In addition to the humanitarian reasons for improving acute pain treatment, there is now convincing evidence that unrelieved acute pain may result in harmful physiological and psychological effects. These effects may results in significant morbidity and even mortality. Recent years have seen the development of new analgesic drugs and sophisticated drug delivery system. Newer analgesic techniques such as PCA, spinal opioids and regional analgesia techniques provides superior pain relief as compared to intermittent IM opioids but such techniques have their own risks and therefore require special monitoring. It is becoming increasingly clear that the solution to the problems of postoperative pain management lies not so much is the development of new techniques as in development of an organization to exploit existing expertise.