Christine, I've tried so many kinds of fiber... psyllium capsules, psyllium powder, psyllium seed powder, citracel, metamucil, etc etc. The only one I think that works for me are the metamucil wafers. Maybe because they are in such a different form of fiber, they might work for you, too. I don't like the calories they have or the wheat, or any of the other additives, but they really are the only thing that have worked.
I don't know if you want to use them during the flare and you said you can't tolerate fiber, but maybe when the pred kicks in, they might help, even having half a package.
I'm sorry to hear about the flare and sending good thoughts your way.
Potato... Female, 59, dx 11/07 mild left sided ulcerative colitis (50 cm), 10/09 condition has "considerable worsened" (per my GI) to panulcerativecolitis
Currently on Pred 5 mg, Asacol 3 3x a day, Rowasa every other night
Imuran 150 mg (off until liver function is normal) 12/15/09 Back on Imuran 75 mg with weekly liver/blood tests 12/21/09 liver tests off the chart again, so I'm off Imuran for good.
omeprazole 2xday, lomotil, cholestramine, atenolol, oxazepam (anti anxiety med) when needed, primadophilus reuteri, childrens centrum, slow FE, nicorette gum, metamucil fiber wafers