Do you get pre-medicated? I tend to get a headache unless I have my tordahl (sp?) which is an amped up aspirin product. They give it in your iv before they start the ivig. I also get 25 mg of benedryl iv and between the 2 meds, I don't get a headache most of the time. I have them start my iv at 125 and amp it up slowly until they get to 175. If I start to feel any kind of a headache, we take it back down to 125. Good luck!