It was the last to go for me, too, maybe even a month into using them, sometimes twice a day. I haven't really seen and blood in a month, I feel close to remission and have been working at tapering them to every other or third day.
For me, most everything I've tried has taken much longer to produce good results than I expected. Add patience to one of the many things I'm learning from UC.
Potato... Female, 58, dx 11/07 mild left sided ulcerative colitis (50 cm)
asacol 3 3x a day, cortenema (generic) every third night
culturelle, benefiber wafers metamucil wafers, activia yogurt, spinach & sunflower diet, primadophilus reuteri, Centrum, Vitamin E 400 mg
omeprazole 2xday, oxazepam when needed, lomotil or ImodiumAD when needed
Yoga, meditation, The Work by Byron Katie, exercise at least 5 days a week