I have had chronic diarrhea for 21 years now. My doctor happened to give me Welchol for an unrelated reason. It is fantastic for controlling the diarrhea. For several months, I have not had to worry any longer about eating only at home, or being within five minutes of a bathroom. The doctor is trying to get me off of the Welchol as it did not do what he wanted, but I am fighting it because of this side benefit. I started at 4 625mg pills/day, but found that it still works well enough at just 2 pills with dinner. Hope it helps someone else.