Shingles and Postherpetic Neuralgia: What helps with Pain?

Has anyone suffered from LONG lasting neuropathic pain as a result of Shingles, and what treatment do you use for the pain? My daughter had shingles at 21, a spinal cord stimulator inserted and removed, many trigger point injections, all of which may have contributed to the thoracic pain she has. She is now 34, and teaches yoga, but is still on a compound prescribed by a pain management Dr. in NYC what is basically Oxy. I am paying for this, since neither she nor her husband can afford it at around $500 a month. She could not find a physician in Fl. I know who would prescribe this medication after 10 years, thus the use of an out of state physician. I do not want to see her suffer, nor can I discuss much with her since we barely speak, but this expense, coupled with paying for asthma inhalers that are expensive is becoming more and more of a strain. Any thoughts for alternatives are appreciated.