I take Levsin and it has worked wonders for me. However, it is not a pain reliever. It decreases spasm in the colon.
My doctor told me to take it for a while and see if it helped, if not he would give me something for pain. I took it whenever I had pain and found it would help a little but not a lot. When I talked to my doc about it - he said that I need to take it EVERY day, whether I am in pain or not. Once I started doing this, about a week later things got dramatically different. Now my pain is rare, and I take dicyclomine when that happens and it helps a lot.