Effect of preoperative pregabalin versus gabapentin on postoperative pain control after laparoscopic gastric bypass surgery

© 2018 Ain-Shams Journal of Anaesthesiology | Publishe Background Perioperative gabapentin helps produce a significant opioid-sparing effect and probably also improves postoperative pain scores. Pregabalin is a novel drug with a heightened research interest in the analgesic, sedative, anxiolytic, and opioidsparingeffects, invariouspainsettings, includingpostoperativepain.We investigated pregabalin analgesic efficacy in morbid obese patients experiencing acute pain after laparoscopic gastric bypass surgery and compared it with gabapentin and placebo. Patients and methods A randomized, placebo-controlled study was conducted on 90 morbidly obese patients undergoing laparoscopic gastric bypass surgery. Patients were allocated into one of the three groups; the pregabalin group in which the patients received 300mg pregabalin, the gabapentin group in which the patients received 1200mg gabapentin, or the control group in which the patients received placebo 2h prior to surgery. Postoperative pain was controlled with intravenous fentanyl via patient controlled analgesia (PCA). Fentanyl consumption over 24 h and pain intensity measured by visual analogue score at rest (static) and during cough (dynamic) at recovery time, 1, 2, 6, 12, and 24h were recorded. Also sedation status, somnolence, dizziness, headache, nausea, and vomiting were monitored. Results Postoperative 24 h fentanyl consumption was significantly higher in the control group compared with both pregabalin and gabapentin groups (P<0.001). Pain intensity on visual analogue score (static and dynamic) was significantly higher in the control group compared with both pregabalin and gabapentin groups at time of recovery, 1, 2, 6, 12, and 24 h postoperatively. Numeric sedation score was significantly lower in the control group compared with pregabalin and gabapentin groups at time of recovery, 1, 2, and 6h postoperatively. No significant differences were found among the three groups as regards somnolence, dizziness, headache, nausea, and vomiting. Conclusion A single dose of 300mg pregabalin or 1200mg gabapentin given 2 h before surgery is better than placebo for postoperative pain control for laparoscopic gastric bypass surgery without significant side effects.