Hi-This is my first post. I have been reading everyone's success story with Caltrate. I am so happy for all of you.I have had IBS-D on and off for 10 years (i'm 23). I have had a bad year, and I am ready to take control!!Linda- You seem to be full of info. I am wondering if TUMS would work the same as Caltrate.It has 600mg of Calcium Carbonate per 2 tablets...I think it would kill 2 bird with one stone...Take care of indigestion and control my IBS-D/Urgency.Please let me know what you think!