For me, when I started IVIG, the benefit lasted about 5 weeks. It started to wear of gradually about 4 weeks and after 6 weeks, it was as though I had never had it.

But, I think it is different for everyone. I was doing 5 days in a row for a total of 2 gms/kg of body weight a month. 9 years later, I am still on IVIG, but I am doing 1 day a week, but still doing the total dosage of 2 gms/kg every month.

Hope the thymectomy goes well for you! Let us know how you are doing.

Juanita