When I've had iron infusions, they used Venofer. I had sets of 4, which sounds like what you're doing. They took about 2 1/2 hours (1/2 an hour was for the benadryl). The infusions themselves have always gone well. However, by the evening of the first one, I get achy, cold, and nauseous. Even when they gave me an anti-nausea drug it happened. The weird thing is, this ugly reaction only happens with the first in the set of 4.
34 years old, Crohn's disease for 15 of them
Current Meds: Humira since 7/08, Pentasa, Effexor XR
Supplements: 3 kinds of Fish Oil, Multi-Vitamin, B-Complex, Vitamins D, E, & K, Calcium, Magnesium, Enzymes
SCD since 12/01/08 - eating Stage 2 foods