I have CIDP and have been on IVIG infusions every 3 weeks for about a year with minor gains. I was diagnosed when my neurologist did the EMG. He caught that there were very different responses in my legs and ordered a spinal tap to confirm the diagnosis. I think the spinal tap is the key to confirming if this is the issue. I watch the threads for other treatments, but nothing seems to work consistently and individual effects vary considerably. Good luck!