You could discuss taking an immunosuppressant such as azathioprene/6 MP. Also, when things aren't getting under control, an aggressive treatment of cyclosporine can be administered (IV drip in the hospital) and then later maintained with azathioprene.
Remicade is a possible option too, and some people have had success with it, especially as a last attempt prior to surgery. Read through some of the other posts to see what others are taking (as mentioned in their signatures) to research possible options to discuss further with your specialist. All the best.
Rio, 31 yr old male - diagnosed with UC in 07/2006.
Alternative therapies for several months (SCD, ayurvedic treatment, VSL#3): didn't work and became anaemic. Canasa, 2 daily: remission for a month then flared-up.
07/07-11/07: 4800mg Asacol (6 x 400mg, twice a day) & Aloe Elite.
Completed first (6 week) tapered course of Pred in 10/07, flaring up since coming off it.
11/07: Switched from Asacol to 12 x 750mg Colazal (3 weeks on it and symptoms got worse)
12/07: Asacol 4800 mg, Started Azathioprene 175mg, Prednisone 60mg - taper.