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Perioperative magnesium sulfate reduces pain scores and opioid consumption following spinal or neurological surgeryMagnesium sulfate helps reduce pain and opioid use after spinal surgery

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Key Takeaway
Consider perioperative magnesium sulfate as an effective adjunct to reduce postoperative pain and opioid use in spinal surgery.

This meta-analysis synthesized data from 9 randomized controlled trials to evaluate the efficacy of perioperative magnesium sulfate infusion for patients undergoing spinal or neurological surgery. The primary outcomes measured were pain scores (VAS/NRS) and opioid consumption.

The analysis found statistically significant reductions in pain scores at multiple intervals: a mean difference of -0.79 at 0 h (p=0.004), -1.03 at 4 h (p<0.00001), -0.78 at 24 h (p=0.005), and -0.67 at 48 h (p=0.0006). Additionally, the meta-analysis reported a reduction in opioid consumption, although specific magnitude data were not provided for this outcome.

No major adverse events were reported during the study period. However, the authors noted that the specific application of magnesium sulfate in neurological procedures requires further research to establish definitive evidence. Clinically, perioperative magnesium sulfate may serve as a safe and effective adjunct for managing postoperative pain and reducing opioid requirements in spinal surgery patients.

How this fits prior evidence

This meta-analysis confirms the efficacy of magnesium sulfate for pain management in spinal surgeries. It addresses a different clinical application than previously reported findings regarding magnesium sulfate and atrial fibrillation incidence in cardiac surgery patients, where no significant reduction was found.

Managing pain after spine surgery is a major challenge for both patients and doctors. Patients often face intense discomfort while trying to avoid the risks associated with heavy doses of opioid medications. New data suggests that adding a common mineral, magnesium sulfate, to the treatment plan could help manage these symptoms more effectively.

Researchers looked at nine different trials involving patients undergoing spinal surgery. They found that patients who received an infusion of magnesium sulfate during their procedure reported lower pain scores at rest. These improvements were consistent across several time points, including immediately after surgery and up to 48 hours later. Additionally, these patients required fewer opioids to manage their discomfort.

While the results show that magnesium sulfate is a safe and effective way to reduce pain and opioid use in spinal surgeries, more research is still needed for other types of neurological procedures. If you are facing an upcoming surgery, talk to your doctor about how this treatment might fit into your specific care plan.

What this means for you:
Magnesium sulfate can lower pain scores and decrease the need for opioids after spinal surgery.

Common questions

Does magnesium sulfate actually reduce pain after spine surgery?

Yes, the data shows that patients receiving magnesium sulfate during their procedure had lower pain scores at rest. These improvements were noted at several stages: 0 hours, 4 hours, 24 hours, and 48 hours after the operation.

Can this treatment help reduce the amount of opioids a patient needs?

Yes, the study found that patients who received magnesium sulfate during their surgery required less opioid medication to manage their pain. This can be helpful for managing recovery after spinal procedures.

Is it safe to use magnesium sulfate during these surgeries?

The review of nine trials reported no major adverse events when using magnesium sulfate as an addition to surgical care. It is considered a safe and effective way to help manage pain for patients undergoing spinal surgery.

Study Details

Study typeMeta analysis
EvidenceLevel 1
PublishedJul 2026
View Original Abstract ↓
BACKGROUND: Postoperative pain following spinal and neurological surgeries is often severe and can hinder recovery, mobilization, and increase risk of chronic pain. While opioids are the traditional standard for pain management, associated risks and the ongoing opioid crisis necessitate alternative therapies. Magnesium sulfate, an NMDA receptor antagonist and calcium channel blocker, has shown promise in reducing postoperative pain and opioid consumption. METHODS: The present investigation utilized a systematic search for studies from PubMed, Embase, and Web of Science. Sources were eligible for inclusion in this review if published from 2010 to present, if patients received a spinal or neurological surgery regardless of patient age, country, race, and gender, and if the source was a randomized control trial, case report, or case series. Sources in non-English, without full-text access, and systematic reviews/meta-analyses were excluded, as well as studies focused on non-human subjects or studies with adjuvant therapies. Nine randomized controlled trials met our criteria. Pain scores (VAS/NRS) and opioid consumption were the primary outcomes. Meta-analysis was conducted using Cochrane Review Manager with fixed or random-effects models depending on heterogeneity. RESULTS: Magnesium sulfate significantly reduced pain scores at rest at multiple postoperative time points, including 0 h (MD=- 0.79; p = 0.004), 4 h (MD= -1.03, p < 0.00001), 24 h (MD= -0.78: p = 0.005), and 48 h (MD= -0.67: p = 0.0006). Opioid consumption was also significantly reduced at various intervals. No major adverse events were reported. CONCLUSION: Perioperative magnesium sulfate infusion is a safe and effective adjunct for reducing postoperative pain and opioid use in spinal surgery patients, with potential applications in neurological procedures pending further research.
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