The first thing that I really noticed was that I had an amazing nights sleep, I took this in the evenings and although unlike the cocodamol getting to sleep was no easier but I was in a real deep sleep. This is not a bad side effect but once I woke up I felt sleepy for hours.
I guess part of feeling sleepy for hours bit was that my head felt cloudy. I just couldn't concentrate properly and I didn't I just couldn't focus like normal. My mind kept wondering and I just felt wrong, this is why I couldn't keep taking it, for the advantages that it gave me (not that much) it just did too much to my head for me to want to keep on taking it.
This is one of the only things so far that has even touched the pain but as with most drugs it has side effects and these were too much for me in this case, others might not suffer from it and it might work for you. In case anyone is wondering I was on 10mg but was told that I could up this to 30mg but I dread to think what I would have felt like taking that sort of dose.
Basically it is not known how they work but it is thought they they work by disrupting the way the nerve impulses are transmitted. http://www.patient.co.uk/health/Neuropathic-Pain.htm