Hello ethomas,
Like you I have tried all the pain and other meds and found Methadone to work the best, use to take 10mg 3 times a day now I take 10mg in the am and started taking 10mg amitripyline at night and its the best solution so far. I have had PN for over six years and most of the day I use a wheelchair when not using a walker. At your age a cure will probably be found in your life time, at my age I also have other health issues. I suggest you take the supplements posted on this forum, work on getting a good nights rest, crazy as it sounds the body will condition its self to pain by numbness although it does weaken the body. Good Luck