Background: Gabapentin is used as an anti-epileptic and in chronic pain but can be used also in acute postoperative pain by giving it preoperatively in a single or in two divided doses combined with intrathecal morphine. Objectives: This study aimed to detect the role and value of gabapentin as analgesic in postoperative analgesia. Presentation of the case: A case with orthopedic surgery that had no postoperative pain for 24 hours and needed no analgesia with good (near normal) mobility after taking preoperative gabapentin and intrathecal morphine with spinal anesthesia intraoperative. Results: It is a rare condition in which the patient is pain-free completely for 24 hours without any postoperative analgesia, most researchers stated that patients who received preoperative gabapentin need less postoperative analgesia or morphine but still there is pain. Conclusion: Preoperative gabapentin has a great effect on postoperative pain, decreasing analgesic doses especially morphine with good and early postoperative mobility.