Hi I have had two Lidocaine infusions about three years ago, the first one worked for about three days the second one didn't and I had some side effects with the second, the consultant decided to go ahead an try me on the mexilitine, I was fine when I was on the low dosage but when I got to the maximum dose I was passing out and generally felt awful, that was when they thought it was PN I had but my condition has got worse and I have now been diagnosed with small fibre sensory neuronopathy, I have just joined this site in the hope I can get some information about my condition as it is very rare and can't find very much about it. Ihope the information was of some help to you.