Systematic Review on the Effectiveness of Distal Sodium Channel Block in Managing Lumbosacral Radicular Syndrome

Lumbosacral Radicular Syndrome (LRS), or sciatica, is a neuropathic condition caused by compression or irritation of spinal nerve roots or the spinal cord. Despite a wide range of conservative and invasive treatment options, many patients continue to experience chronic pain with varying degree of intensity of pain. Voltage-gated sodium channels have been identified as mechanism to pain transmission, so it is targeted for intervention. Distal Sodium Channel Block offers a peripheral, minimally invasive approach, an outpatient procedure, by targeting these channels. Aims: This review aims to assess the clinical outcome, underlying mechanisms, safety profile, and effectiveness of DSCB in LRS management. Specific objectives include exploring the pathophysiological rationale for sodium channel blockade, evaluating clinical outcomes from authentic published studies in various journals, and identifying gaps in current evidence to guide future research and better patient management. Materials And Methods: The careful extensive evidence-based literature review was done on different published human studies of lumbosacral radicular syndrome using DSCB. Inclusion criteria encompassed studies reporting pain intensity, functional status, route of administration and adverse effects. Data extraction included study design, sample characteristics, drug type and administration, side effects, outcome measures, and follow-up duration. Quality was assessed using appropriate methodological tools for each study type. Results: Across multiple studies, DSCB led to a significant reduction in pain scores, with VAS scores decreasing from an average of 7.8 pre-intervention to 1.0–3.9 post-intervention over 30 days. Astudy reported a ≥50% pain reduction in about 88% of patients at 15 days, sustained in approximately. 85% at 3 months. Immediate relief within 30 minutes was observed in over 90% of cases. Functional improvements, including enhanced walking ability and decreased disability scores, were consistently reported. Adverse effects were minimal or absent in the reviewed studies. Conclusion: DSCB is a promising, mechanism-based treatment for LRS that offers safe, cost-effective, and rapid symptom relief in appropriately selected patients. While preliminary evidence is favorable, larger randomized controlled trials with standardized protocols are needed to confirm long-term efficacy and optimize treatment parameters. Until then, DSCB can serve as an effective adjunct in the multidisciplinary management of radicular pain.