I'm guessing your fiance is diarrhea predominant? Has he tried taking immodium? Does he have any anti-spasmodic drugs from his doctor? If not, it might be worth trying. I also take calcium within the first few bites of my meal and this has helped immensely. I can almost gaurantee I will get sick if I don't take my calcium. Also, since I bounce back and forth between diarrhea and constipation, I find the best way to "stay on the right track" is to keep myself as regular as possible by take fiber supplements, eating Fiber One cereal every morning, and drinking at least 8 glasses of water a day while not taking in any caffiene. Of course, for some, the fiber does more harm than good. Best wishes to you!~Mrs. Mason
(edited to add the following):Also, in part, this is the normal course of IBS. This is why doctors have so much trouble telling us what to do to "fix" our IBS. Something that has helped us for years will suddenly stop helping, or something that has made us sick for years will suddenly not make us sick anymore. It is a constant battle to stay on top of what is making us sick this week and what isn't. You might want to read some of the articles on the site here, they might give you some ideas. I hope you and your fiance can figure something out soon!