I've had iron iv before. I went to a hematologist at a cancer clinic to get it done. I think there are two different types I think. The first type is a one day it takes a couple hours I can't have it cause I had an allergic reaction. They will probably have the first twenty minutes watching for signs of a reaction. The other type I ended up getting I went in and it was about 3 days a week for a couple of Weeks. They will probably recheck his blood work a couple Weeks later once he's done.