I am beginning a trial of this supplement (which is really a drug and very potent). It is still over the counter, and has been used mostly as a "smart drug".

It is a cholinergic acting substance and as such should be handled with care. My son is using it for ADHD and concentration issues. So he recommended it to me.

I started today with 50mcg in the morning. I am feeling stronger today, and have much less general pain.

So I looked it up more in detail just now and found a chronic pain entry discussing it for neuropathic pain.
http://www.pnas.org/content/110/8/E746.short
It appears to be a NMDA antagonist which is what most of the recommendations consist of for nerve pain. Magnesium is another NMDA antagonist too.

I bought the Source Naturals from Amazon. 100mcg dose which I cut in half for now. (it was an nice affordable price there).

Our MG forum has some posts on this too...to help them with muscle weakness and I am noticing this action today on this first dose for me. I am optimistic this will be a nice thing to help me cope better with my chronic pain. This winter was pretty hard on me.

I'll keep this thread going, in case anyone wants to respond.