The side effects I had with increasing were dizzy,nausea,pressure on my head like I have a tight hat on. As for the block. Is this a sympathetic nerve block? What doctor suggested this? Is he an anesestologist? Are you increasing neurontin weekly? See my block was for my RSD. It was not mentioned for PN and I rarely hear people who have PN have it. I am not saying you should or should not. With my doctors first was meds,then blocks,then more invasive. I have read though blocks work best early in treatment. So I don't know and of course it is a personal choice.