Flupirtine – Back in Action? A Systematic Review and Meta-analysis of Its Efficacy and Safety in Low Back Pain Management

Background and Objective: Low back pain (LBP) is prevalent in India, adversely affecting quality of life and contributing to economic burdens. Current guidelines recommend weak opioids like tramadol for symptomatic relief, but side effects limit their use. Flupirtine, a nonopioid analgesic, may provide a better alternative. This meta-analysis evaluates the efficacy and tolerability of flupirtine compared to tramadol and nonsteroidal anti-inflammatory drugs (NSAIDs) in LBP management. Methods: A systematic search of Evidence-Based Medicine Reviews, Cochrane Library, and PubMed identified relevant randomized controlled trials (RCTs) using keywords related to flupirtine, tramadol, NSAIDs, and LBP. Results: A total of 186 studies were identified out of which, 6 RCTs involving a total of 869 patients were eligible for analysis. In comparison to tramadol, flupirtine resulted in a significantly more reduction in the pain intensity on both Numerical Rating Scale (NRS) (mean difference [MD] = −0.42; 95% confidence interval [CI]: −0.67 to −0.17, P < 0.0001) and visual Analog Scale (VAS) score (MD = −0.23; 95% CI: −0.32 to −0.14, P < 0.0001). Flupirtine was found to be significantly better tolerated than tramadol in terms of total adverse events (AEs) (odds ratio [OR] = 0.49; 95% CI: 0.35–0.68, P < 0.0001), nausea (OR = 0.20; 95% CI: 0.12–0.33, P < 0.0001), vomiting (OR = 0.17; 95% CI: 0.08–0.37, P < 0.0001), and constipation (OR = 0.37; 95% CI: 0.17 to 0.83, P = 0.02) and had significantly lower treatment discontinuations (OR = 0.28; 95% CI: 0.14–0.60, P = 0.0009). When compared with NSAIDs, flupirtine resulted in significantly more reduction in the pain intensity on VAS (MD = −0.76; 95% CI: −0.82 to −0.70, P < 0.00001), and it was better tolerated than NSAIDs in terms of total AEs (OR = 0.40; 95% CI: 0.19–0.85, P = 0.27) and upper gastrointestinal pain and nausea (OR = 0.21; 95% CI: 0.09–0.48, P < 0.0003). Conclusion: Flupirtine offers better pain relief and fewer adverse effects than tramadol and NSAIDs in LBP management, making it a viable alternative for patients intolerant to opioids or NSAIDs.