I have a suggestion: I also have PHN from a severe shingles attack. Mine isn't as bad as yours. I do still feel some pain and discomfort after a year. It also affects the bladder condition I have, which is Intersystitial Cystitis (bladder pain syndrome). And we get attacks because our immune system is not up to par, studies say. And that makes sense. I have found that most of the drug options and other pain treatment options do not work for me. I look for natural methods to treat. And since you cannot eliminate a virus, you do something to make it better. It makes sense to boost the immune system so that it can fight the virus. Here is what I have found that helps me. I use L-lysine to help the immune system. It is an amino acid that is for that purpose. You can get it at Walmart and is not expensive. You can take 3 a day. I also found Red Marine Algae to be helpful. Both help ease the pain. Of course, you don't want anything to interfere with medications. Hope this helps!!