Any pain I've had from UC has been swift (but blinding) just from spams while on the toilet during a flare.
Such ongoing pain as you describe seems very unusual.
I have had three epidural shots for my lower back pain, to get down inflamation from slightly bulging discs. Cortosteroid, I think.
They helped, but no miracles. Generally I believe you have to address what's causing the pain, not just mask it. I only got the shots because my regular doc convinced me that the pain was keeping the inflamation from subsiding (and nothing else that usually worked was working, I gave it months before giving in).
49 year old female attorney, diagnosed UC/pancolitis 1985, no surgery but much suffering. Asacol maintenance for 20+ years; used prednisone & Rowasa for flares. Probiotics (Ultimate Flora, 50 billion), salmon oil (omega-3) when I can remember.
August 2008 sought care of naturopathic doctor. Food sensitivity test showed wheat/gluten, other intolerances; eliminated wheat/gluten from my diet.
Bad flare in March, used prednisone. Humira denied, started Remicade 4/12 and doing great~ learning what normal is~ wow