I usually use anti-diarrheals (Bentyl) along with Pred to get BMs under control but usually thats only for 5-6 days till Pred starts showing its effect. You are not going to get away without Pred if its acute flare. If you are in remission, you won't have diarrhea. If you have diarrhea, most likely you are in flare and you need to take appropriate meds.
I agree that you shouldn't be using prednisone to treat flares. There are lots of other UC meds that reduce inflammation that you can try.
From my knowledge and experience, there is nothing other than Pred to get your acute flare under control. The other drugs that we take are maintenance drugs. They don't treat your flare.
Diagnosed March 2007 with left sided UC at the age of 30.
Colazal 9 daily, Imuran, 100mg + 50mg, Vit. B12, 1mg, Multivitamin, 1 tablet daily, Fish oil 1200mg daily, Vit D 2000 IU daily, Butterbur 150mg daily.
Verapamil 240mg for migraine, Migraine episode now at least twice a month,
Ibuprofen 400mg is the only solution (but leads to bleeding). Looking for alternatives.