As far as I know, and others who have more experience will chime in, it tells your nerves to shut up and stop acting haywire. It stops a lot (but not all) of the buzzing.
Neurotin is the same as Gabapentin. Lyrica is a gaba thing but I'm not educated in the differences. The one I'm on is Oxcarbazepine, which most people here are not on. I had a hard time with short term memory for a few weeks but got through it and now it's not a big side effect. I know there are other options.
http://www.mayoclinic.com/health/pai...ations/PN00045
Mrs. D will give a better explanation.
Do you know why this is happening? There are a lot of things one can do to help if you know why. Like if you're prediabetic, cut out sugars. If you're B12 low, start taking it (take it anyway). If you're hypothyroid, get on that med. A lot of this can be found out via blood test, and your insurance should cover that.
The breakthrough pain is the pain that one feels even after the person takes their normal meds. So for me, my brother got married this past weekend and I was up until 1:30 babysitting their house after they left. Between being on my feet, probably a little of the wine, the heat, etc I was beyond sore on Sunday and almost in tears. This was new to me as I haven't had PN that long. It was like having a migraine, taking the meds, and then the migraine gets worse.