Effectiveness and Safety of Atelocollagen in the Management of Chronic Non-specific Low Back Pain

Inclusion Criteria: \- Non-specific low back pain with persistent paraspinal tenderness of NRS 4 or higher despite conservative treatment (including physical therapy, exercise therapy, oral drug administration, and epidural block) for at least 3 months. Adults 19 years of age or older Exclusion Criteria: \- Systemic or local infection Coagulopathy Patients whose structure is difficult to confirm on ultrasound due to significant deformity of the lumbar spine Neoplasm of spine Cognitive disorder Patients with hypersensitivity to local anesthetics or amide-based local anesthetics Patients those who are allergic to or sensitive to atelocollagen ingredients or pork Women who are pregnant, lactating, or planning to become pregnant during the clinical period, or women of childbearing age who are not using available contraceptive methods Those who participated in other clinical trials within 30 days prior to screening or 5 times the half-life of the investigational drug in the clinical trial in which they participated, whichever is longer, whichever is longer Patients with serious systemic diseases