I had two broken legs in the interim, due to a pitching forward of my transport chair, so pain was am part of the interim healing.
As far as iVIG infusions before and after that time, I believe the infusions lessened nerve pain, increased leg strength and range of motion. They happened simultaneously with PT twice a week, once in Aquatherapy at a nearby university pool.
I did not have any negative reactions to infusions, aside from minor body acne, which eventually cleared up.
I hope this helps.