hi NL, yes i used to take Colofac many years ago, and they helped me a lot.. i think a great deal of my pain was in fact spasms, and they really were an effective drug. also, my mum suffers from IBS, and when she was really bad she was given Colofac, and again it helped.
the other good thing is, i think they're pretty well tolerated by most people, i certainly had no nasty side effects from them.