A total of 54 patients were divided into three groups (n = 18) according to the type of preoperative drug administrated, as follows: Group A: ketorolac 10mg (Siegfried Rhein S.A. de C.V, Mexico,DF), Group B: Diclofenac Na 50mg (Voltaren, Novartis Mexico), and Group C: A placebo (capsule filled with sugar).