You need to drink COPIOUS amounts of fluids the days before, during and after an infusion. Make sure the rate is not too fast, and since you are having trouble, reduce the rate. You may also need to change brands. I had HORRIBLE headaches with Carimmune. Gamunex--not so much. You may also use ibuprofen the day of/and after. Tylenol is useless, IMO. It does nothing for inflammation, which is the cause of the pain in the first place.

Bottom line--don't suffer in silence. Speak up and work toward a solution.