I just started it a week ago, and I've been flaring since I stopped taking Asacol at the beginning of July. I didn't notice anything at first, but the last couple of days I've been going alot less, things have been somewhat formed, less bloody. It would probably be safe to try it now, get the initial gassy bloated reaction out of the way. The thing about starting something new while on Prednisone is that you can't be sure what is helping more, the new stuff or the Prednisone.
Diagnosed w/ moderate UC in May '06, had symptoms for years prior to dx - currently flaring
Asacol, Florastor, VSL#3, Wellbutrin XL, Prozac, multi-vitamin, and fexofenadine for allergies