I had good luck with Voltaren when I had temporary arthritis related to UC (in my rib cage, of all things), but it is also a NSAID and has risks. It worked immediately so I didn't have to take it very long.
I took Celebrex for my back, and don't remember that it made my UC worse. Now my insurance won't let me have it, so I've only used samples, short term.
49 year old female attorney, diagnosed UC/pancolitis 1985, no surgery but much suffering.
Asacol/5ASA maintenance for 20+ years, usually 3 pills 2x day.
tapering OFF prednisone from lingering flare;
August 2008 sought care of naturopathic doctor. Tested gluten intolerant and started gluten-free, soy-free, etc. diet which resolved flare. Also Replete probiotic, DGL (licorice root, slippery elm), Permeability Factors. Slow-release iron and B-12 shots for severe anemia.
Sept: Mild case of thrush in throat, prescribed antifungal mouthwash.