• J Clin Anesth · May 2022

    Post-cesarean gabapentin is not associated with lower opioid consumption or pain scores in women on chronic buprenorphine therapy: A 10-year retrospective cohort study.

    • Holly B Ende, Jeanette R Bauchat, Laura L Sorabella, Britany L Raymond, Xiaoke Feng, Matthew S Shotwell, and Michael G Richardson.
    • Department of Anesthesiology, Vanderbilt University Medical Center, 1211 Medical Center Drive, Nashville, TN 37232, USA. Electronic address: holly.ende@vumc.org.
    • J Clin Anesth. 2022 May 1; 77: 110600.

    Study ObjectiveTo determine if postoperative gabapentin administration is associated with decreased opioid consumption or pain scores following cesarean delivery in women on chronic buprenorphine.DesignRetrospective cohort study.SettingPostoperative recovery area and postpartum inpatient unit.Patients214 women undergoing cesarean delivery while on chronic buprenorphine at a single institution between 2007 and 2017.InterventionsGabapentin treatment for post-cesarean analgesia.MeasurementsThe primary outcome was opioid consumption in morphine milligram equivalents, comparing patients who received ≥1 dose of gabapentin within 24 h of cesarean delivery to those who did not. Secondary outcomes included opioid consumption 24-48 and 48-72 h post-cesarean and postoperative numerical rating scale pain scores.Main ResultsOf 214 included patients, 64 (30%) received gabapentin while 150 (70%) did not. Gabapentin patients were more likely than controls to have received neuraxial fentanyl (30% vs. 14%, p = 0.01) and transversus abdominis plane block (6% vs. 1%, p = 0.05) and overall received higher doses of ketorolac and acetaminophen. Control patients were more likely to have received neuraxial morphine (78% vs. 90%, p = 0.04) and received higher doses of ibuprofen. In unadjusted analysis, there was no significant difference in morphine milligram equivalent consumption 0-24 h postoperatively between gabapentin (55 mg [IQR 26,84]) and control (53 mg [IQR 28,75]) groups (p = 0.38). After controlling for potential confounders, there remained no significant effect of gabapentin administration (overall effect p = 0.99). Opioid consumption and pain scores were also not significantly different at any other time points.ConclusionsIn parturients receiving chronic buprenorphine, inclusion of gabapentin in a multimodal analgesic regimen was not associated with lower opioid consumption or pain scores during the first 72 h after cesarean delivery. Prospective randomized studies are needed to confirm these findings.Copyright © 2021 Elsevier Inc. All rights reserved.

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