Treating the symptoms of sciatica with drugs (NSAIDs, muscle relaxants, epidural steroid injections, nerve blocks, etc.) or surgery (laminectomy, discectomy, foraminotomy, spinal fusion, etc.) does nothing about the cause of the problem so damage continues to happen and the symptoms will often return.
Correcting the imbalanced posture with specific exercises that restore joint alignment and proper movement patterns is the only long term cure for sciatica.