... controllable diarrhea. Since I take this for uncontrollable diarrhea ... is this a Side Effect? Is it true Crohn's Disease is helped by Cholestyramine? How about Celiac Disease? I realize that the latter can be detected by a blood test. Of course two years ago after the expensive tests showed nothing wrong ... No blood test was ever ordered. I asked for this medicine after seeing it on a TV program. I was not helped by the six doctors that put me through all those tests. Colonoscopy ... Ughhhhhh!