The IV Prednisone does apparently work faster and more efficiently. It's probably the best thing to do. They will likely give her and IV antacid too, (Rantidine, sp.). Ask the Doctor about the dosage, as IV Prednisone is actually stronger at the same dose. 40mgs IV, is equivalent to 50mgs of Oral. I just found this out recently myself.
Please keep posting updates. As I said earlier, there is a wealth of knowledge here. Prayers coming your way.
I am so encouraged that your daughter is only on Pentasa. That is all I take too, unless I have a flare up I can't recoup from alone adn then will use prednisone. I hear so many on this site that use so many meds and I am not a medicine person. Though I am know they don't use it unless completely necessary. Want to go easy on my kidneys, you know. I hope and pray that my daughter will be able to heal enough to not need much.
Thanks, God Bless, and Happy New Year. God Bless Your daughter too!! May she stay in good health (as good as it gets with IBD) :)