Hi,
My Neurologist put me on Lyrica 75mg twice a day, my Rheumy doubled the dose when I told her it was not helping. When I upped it to the 300mg- 150mg twice a day, I noticed that I started having brain fog and blurred vision, so I stopped it a week ago. I may try it again, but it didn't help the burning pain much. I had no other side effects, besides the fog and blur.
I would say it is worth a try, not many other choices out there.
Hope this helps.