I have tried all 3 of those and the Namenda for the PN in general...with no success. I am now going to try lidoderm patches on the bottom of my feet (which might not work since he feels the pain is coming from ganglioneuropathy in the dorsal root ganglia in the spine). I may try one of the patches (or half) on my leg to see if it settles down the allodynia. I did read on the Wiki site Dr. Smith attached that lidocaine (topical) is helpful for this. We'll see.