The one thing that worked well for me when I had to use one was a drug called Levsin. I used it for colon spasms when my colitis was the worst. I am not sure it still around but I assume it is but check with your doctor.
Diagnosed with left sided UC in sigmoid colon and rectum 1986.
Put on Azulfidine 2 X 3 a day and Rowasa enemas 60mg.
Have been pretty much in remission overall other than a few flares over the past 21 years.
Medicine changed to Asacol 400mg 2 pills X3 times a day. Taken off all meds in 2004.
Diagnosed with acid reflux 2005. Put on Protonix 40mg.
Have been using Canasa 1000mg suppositories nightly since January 2007.
Was put back on Asacol 400mg 2 pills 2X a day in July 2007 maintenance.