Hi, welcome, and sorry that you're here! I'd recommend that you go to the Chron's and Colitis Foundation of America website (ccfa.org) and read their info about medicines. They have a lot of great, complete info on the different classes of medications.
There are other 5ASA drugs you could try (depending on where your UC is located), such as Colazol. It's related to mesalamine and I'm not sure how it is different. You could also try the "old-school" sulfalzine.
The usual "next step" are immunomodulators like 6MP and Imuran.
Then there is Remicade, a biologic drug.
I hope you find some relief soon! Definitely get in to see your doc and find something to help you get off the pred!
Symptoms began in November 2008, ~4 weeks after giving birth to my son.
Eased for ~3 weeks in December, possibly b/c of probiotic use?
Returned in January 2009 (with a vengeance), diagnosed with pancolitis on January 30.
Currently taking Asacol (400mg 4 pills 3x daily), Rowasa nightly, Culturelle probiotic, and Zoloft (25 mg).