Myth-buster
Intravenous magnesium for chronic pain: a meta-analysis of 55–82 participants found no statistically significant reduction — but the evidence is low-certainty and far from conclusive.
This null result from a high-quality meta-analysis undermines the popular claim that magnesium relieves chronic pain, but because the analysis included very few patients and the evidence quality was low, the question is still unresolved — larger, more rigorous trials are needed.
A Cochrane meta-analysis pooled results from two small studies (82 participants total) and found that intravenous magnesium did not significantly reduce pain intensity in the short term compared to placebo. The average difference on a pain scale was only -3.47 points (95% CI -15.25 to 8.31), and the authors rated the evidence as low certainty. This suggests that any potential benefit of magnesium for chronic non-cancer pain is uncertain and likely small, if it exists at all.
Where this fits in the evidence
This is among the first studies we've indexed on Magnesium for Reduced Pain Intensity — treat it as an early signal until more research accumulates.
The study
Ketamine and other NMDA receptor antagonists for chronic pain.
- Meta-Analysis
- n = 2,309
- 2025-08-18
- The Cochrane database of systematic reviews
This is a plain-language summary of a research finding, not medical advice. Pillser surfaces research signals to help you decide what's worth investigating — always consult a qualified professional before changing what you take.