The goal of this clinical trial is to assess the clinical efficacy and safety of sodium aescinate in treating low back pain (LBP) in adult participants.
Meets the diagnostic criteria for chronic low back pain (cLBP) recommended by the Clinical Practice Guidelines for Chronic Low Back Pain in China (2024 Edition): the course of disease lasts at least 12 weeks, with pain occurring in the region below the lower costal margin, above the gluteal crease (horizontal gluteal fold), and between the midaxillary lines on both sides, which may be accompanied by pain in one or both lower extremities.
Has moderate to severe pain, with a Visual Analog Scale (VAS) score > 4 points.
Aged between 18 and 65 years old.
Has a clear understanding of the study content, good compliance, and high willingness to cooperate.
Is in the acute pain phase or acute exacerbation of chronic pain.
Has low back pain caused by other reasons such as infectious diseases or tumors, including but not limited to spinal tumors, spinal tuberculosis, spinal cord infections, etc.
Has a history of allergy to sodium aescinate.
Suffers from systemic diseases or organ dysfunction.
Parallel
Sodium Aescinate Tablets
DrugThis intervention is an oral sodium aescinate tablets. Each tablet contains 30mg of sodium aescinate as the active ingredient. Eligible participants will take 2 tablets per dose, twice daily (bid), for a continuous 6-week treatment period. The drug is provided by Shandong Luye Pharmaceutical Co., Ltd. and is administered in a double-blind manner, with the placebo control having identical appearance, dosage form, and administration route to ensure masking. The intervention aims to improve pain, disability, and functional status in adult patients with chronic low back pain by exerting anti-inflammatory, detumescent, and microcirculation-improving effects.
Placebo
DrugThe intervention dosage is 2 tablets (30mg/tablet) per administration, twice daily (bid), for a continuous 6-week treatment period. During the study, participants will complete follow-up visits at baseline (week 0), week 1, week 3, and week 6 for efficacy assessments (VAS, ODI, JOA, SF-36 scores) and undergo lumbar MRI scans at baseline and week 6 to measure paraspinal muscle cross-sectional area and fat infiltration rate. All adverse events experienced during the treatment period will be recorded in detail.
Pain Intensity Assessed by Visual Analog Scale (VAS) Score
Pain intensity will be assessed using the Visual Analog Scale (VAS), a validated tool with a score range from 0 to 10 points. A score of 0 represents no pain, and a score of 10 represents the most severe pain imaginable. This outcome measure evaluates changes in pain intensity in adults with chronic low back pain (cLBP) following treatment with oral sodium aescinate tablets.
Disability Severity Assessed by Oswestry Disability Index (ODI) Score
Disability related to low back pain will be assessed using the Oswestry Disability Index (ODI), a widely used questionnaire with a total score range of 0 to 50 points. Higher scores indicate greater disability in activities of daily living. This outcome measure evaluates changes in functional disability in cLBP patients after treatment.
Lumbar Functional Status Assessed by Japanese Orthopaedic Association (JOA) Score
Lumbar spine function will be evaluated using the Japanese Orthopaedic Association (JOA) score, which ranges from 0 to 29 points. Lower scores indicate more severe functional impairment. This outcome measure assesses changes in lumbar spine function following treatment.
Health-Related Quality of Life Assessed by SF-36 Total Score
Health-related quality of life will be assessed using the 36-Item Short Form Health Survey (SF-36). The total score ranges from 0 to 100 points, with higher scores indicating better overall health status. This outcome measure evaluates changes in overall quality of life in cLBP patients following treatment.
Lumbar Paraspinal Muscle Cross-Sectional Area Assessed by MRI
Lumbar MRI will be used to measure the cross-sectional area of paraspinal muscles as an objective indicator of muscle mass. This outcome measure evaluates changes in paraspinal muscle size following treatment with sodium aescinate tablets.
Incidence of Adverse Events During Treatment
All adverse events (AEs) occurring during the 6-week treatment period will be recorded. For each AE, the type, severity, duration, and relationship to the study drug will be documented to evaluate the safety of oral sodium aescinate tablets.
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