Drug : Maxigesic or placebo (normal saline) was randomly assigned as an adjuvant used for postoperative analgesia

A pilot study for calculating sample size to evaluate the effectiveness of Maxigesic® on postoperative pain control in patients undergoing laparoscopic gastrectomy

A study to collect data for evaluating the effectiveness of Maxigesic® on postoperative pain control in patients undergoing laparoscopic gastrectomy