I received IVIG for several years for anti-MAG neuropathy (similar to CIDP) and had good results. The treatments started out with slow infusions a day or two apart. I was given tylenol and benadryl prior to the infusions (at a hospital outpatient infusion center) which helped prevent allergic reactions, but made me very sleepy. The infusions lasted 2-3 hours. I would feel groggy, thirsty, and somewhat "gassy" afterwards for a couple of hours. I tolerated the treatments well and my insurance paid for them. We were able to spread the treatments out to once every 6 weeks - 2 months. Over 3 years they became less effective in decreasing the neuropathy, so I stopped. You need to have good veins though as the IVIG is rather viscous and can irritate the veins and cause tissue problems if it goes into the tissue instead of the vein.
Good Luck!