Here's a link to a page on the CCFA website that has links to the different classes of meds:
http://www.ccfa.org/resources/types-of-medications.html
Also, I'd give mesalamine-based oral meds (Lialda, Apriso, Asacol) another try, IN CONJUNCTION with mesalamine enemas. Canasa are ok, but the enemas cover a much larger area of the colon.