Background: This study evaluated the effect of bilateral endoscopic sphenopalatine ganglion block (SPGB) for management of postoperative pain in patients undergoing septoplasty.Methods: Sixty septoplasty patients (51.7% male, 48.3% female, aged 18 to 45 years) were randomly assigned to general anesthesia (GA) alone (control) (n = 30) or GA plus endoscopic SPGB (n = 30). Demographic data, duration of surgery, blood loss, postoperative visual analogue scale (VAS) pain scores (upon arrival at the postanesthesia care unit [PACU] and 2, 6, 12, and 24 hours after surgery), overall analgesic usage (end of 24 and 168 hours a er surgery), overall satisfaction with the pain control (end of 24 and 168 hours a er surgery), and complications (bleeding, nausea and vomiting, and visual disturbance) were recorded.Results: Pain scores upon arrival to the PACU and 2, 6, 12, and 24 hours a er surgery were significantly lower in the SPGB group compared to the control group (p < 0.001). Moreover, the SPGB group had significantly lower anal-gesic requirements and higher satisfaction scores with their pain control at the end of 24 and 168 hours a er surgery compared to the control group (p < 0.001). The 2 groups significantly differed in terms of intraoperative blood loss (p = 0.024), and surgery time was longer in the SPGB group compared to the control group (p < 0.001).Conclusion: SPGB with bupivacaine is a safe and effective method to reduce pain a er septoplasty, and it is a costeffective alternative to high doses of analgesics. C 2019 ARS-AAOA, LLC. How to Cite this Article: Ekici NY, Alagöz S. The effectiveness of endoscopic sphenopalatine ganglion block in management of postoperative pain a er septal surgery. Int Forum Allergy Rhinol. 2019;9:1521-1525.E ffective management of postoperative pain is a critical component of nasal surgery. Insufficient pain management can lead to poor outcomes, including decreased patient satisfaction, long-term hospitalization and delayed resumption of work, treatment with high doses of analgesics, and increased healthcare costs. Despite considerable improvements in analgesia and surgical techniques, there is no consensus for pain control and avoidance of overprescription after nasal surgery. Numerous pain medications, such as nonsteroidal anti-inflammatory drugs (NSAIDS), gabapentin with or without intravenous dexamethasone,