I'm taking Metamucil and it helps sort of but I just started taking the Caltrate Plus, once a day. Should I still be taking the Metamucil or just the Caltrate. Also, how long does it take for Caltrate to work? I haven't really noticed a difference, of course it has only been two days. I go to the doctor tomorrow for a follow up when I first came to him with the D. I first was on Fibercon (didn't work), tried Levbid I think it worked for my D, but too many side effects made me feel too drugged. So the next step is to do the colonscopy, because the doctor hasn't officially said I have IBS.