Background; postoperative pain remain the most common dilemma for surgical patients, there are many
 methods for control of pain, either by conventional postoperative analgesia or preoperative analgesia.
 The aim; is to evaluate the benefit of Diclofenac as pre-operative analgesia in comparison to the
 postoperative conventional treatments.
 Methods and Patients; this study includes patients of different age and sex groups, underwent different
 elective and emergency surgical operations,
 They divided in to two groups:
 - Group A (100 patients): controlled group, were received pre-operative analgesia.
 - Group B (100 patients): compared group, were received the conventional analgesia.
 Results; thirty eight percent of patients in group A have significant pain versus eighty six percent of the
 patients in group B (P value 0.0000)
 Preoperative analgesia as single dose of Diclofenac is more effective in control of postoperative pain
 than conventional postoperative analgesia.
 Conclusion; we could say that the pre-operative (pre-emptive) analgesia is safe, feasible, well tolerant,
 less costly and more effective for the control of different types of the surgical pain.