When to quit IVIG

I have been on IVIG every 3 weeks for about 5 years now. If I go more than 4 weeks I begin to have difficulty walking even short distances. In 1995 when I first started IVIG it was infusions four days in a row then 1 six weeks later, and then 1 six weeks after that. Then none for about a year and a half, and then again the same regimen. Some of the way I receive it might be because of my age as I will be 75 on my next birthday and I do have other medical problems. I don’t anticipate ever getting off the infusions.

Ron