I am taking 450, so when I add one I'm up to 600. My neuro was going to try to increase me to 600 but I get a lot of side effects at that dosage...but will probably see it someday. He hinted that he might be willing to go higher than 600 if need be, said something about the limit being somewhat arbitrary if I remember correctly, but of course I'm not sure I would want to take the risk. I am not really seeing that neuro anymore...but just so you know, there might be someone who would be willing to go higher than 600 if you were willing to try it. Again, I'm not sure I would...I would search long and hard to see where people have gone with it, since some of these neuro meds can have such horrific side effects. Not that RSD doesn't have horrific effects, too.

Take care, Jimbo, and I wish you the best too...