A quick google search shows at least one website recommending caffeine for prevention of IVIG headaches because it dilates blood vessels in the head. Other sites discourage caffeine, because it's a diuretic, and you don't want to be dehydrated. For this reason, still others recommend stopping any caffeine intake during and before the course of IVIG--which is very foolish advice indeed, because there's no easier way to get a horrible headache than to abruptly disrupt a caffeine habit.

Anyway, here's to the kind nurse who got me a cup of coffee on her lunch break.

Abby