Suggest Treatment For Chronic Lower Back Pain
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Detailed Answer:
I read your question carefully and I am sorry about that long history of chronic pain you are experiencing.
From the non medication point of view you seem to have tried the usual options. One remaining option might be transcutaneous electrical nerve stimulation (TENS). Another option when pain is thought to be due to arthritic changes to facet joints might be radiofrequency ablation, a method of stunning the nerve by inserting a needle nearby and sending current to an electrode in order to stop the nerve from sending signals. Acupuncture is an option, it is not well studied as not exercised from medical professionals, but some patients report success and at least it is safe. Spinal decompression therapy or spinal traction as it is otherwise called has also been beneficial for some of my patients, it uses devices which aim to stretch the spinal column.
None of the above options work for all patients, only in a percentage of them, so no guarantees, but since you've run out of options they may be considered.
On the medication front, chronic pain medication consists on two main classes, anticonvulsants such as Gabapentin or Pregabalin, or antidepressants like Cymbalta. Again though effect is partial and only in a percentage of patients. There are also NSAIDs like Ibuprofen, but I suppose you already have experiences with those, trouble with them is long term regular use may have side effects.
I remian at your disposal for other questions.