I have had problems with anemia since I was diagnosed and had to have several blood transfusions as a result. At one point, my body had started killing off my extremities to save my internal organs. I have had one iron infusion and I reacted badly to it. My blood pressure dropped to dangerous levels. But, nurses are very aware that that can happen and are very good at monitoring your stats. My vein also blew during the infusion before they stopped it, so I had a brown stain under my skin for a long time. I haven't had another iron infusion since because of what happened the first time, I just get blood transfusions instead if my iron level gets too low.