I take the regular kind of Co Q 10, 100mg, twice a day. I never got any side effects from it at all. PN in general is definately better a year later. I was close to not walking at all. Now I am walking...something is working and I believe it is this suppliment and so does my doctor. I use the "finest" brand from Walgreens. Yes expensive, but worth it. I sure hope this works for you too. I had about given up, and was looking at a wheelchair. I take several other suppliments as well. Let me know how you do and what kind your doctor finally settled on. It is worth a try! ginnie