The nerve burning in your back has a 3-6 month effectiveness period I have had three. I also have neuropathy in my feet and take 100mg of Pregabalin which I have found helps. I use heat packs when it is cold weather as well. I also take paracetamol/codeine and tramadol for lower back pain due to herniated discs. Pregabalin was originally started to stop sharp jolts of nerve pain due to my back, it was continued and the dosage was raised after I was hospitalised for other reasons and have developed drug induced diabetes.