After suffering for YEARS with chronic diarrhea from a colon resection 50+ years ago that left with no ileocecal valve and only 9 inches of colon ( and trying everything under the sun including Xifaxan that only worked for a few weeks) I was given Welchol. It is given for malabsorption, which I knew I had and I also had SIBO. It is a cholesterol medicine that has a side effect of causing constipation. I started with 2 pills a day and got relief immediately. I now take 4 pills a day and am a new person. It was first given to me by my internist and then when I switched gastros, he asked why my last gastro had not given it to me. Duh. This is a game changer. I get the generic which is fairly cheap. I hope this helps you.