Herniated discs can cause moderate to severe pain due to nerve roots impingement by the disc matter exiting at that level. The
therapeutic options for this are NSAIDs, epidural injections of steroids, physiotherapy and surgical decompression like discectomy and bone grafting. you need to consult a neurosurgeon for evaluation. You have been prescribed drugs like flexeril, muscle relaxant, gabapentin, anti convulsant used for neuropathic pain, opioids, etc.