Bentyl (Dicyc lomine)

Has anyone used this drug to slow the flow for IBS with diarrhea and very painful cramps?

It reduces muscle spasms and helps reduce diarrhea, if that's a problem.

Yup, I used to take it a few years ago when my IBS was really bad.  I was taking a few meds at the same time for it.  There was also a med that I took that you'd put under your tongue if you were in the middle of an attack.  I haven't needed any IBS drugs since my DS though.