I got desparate this week and decided to try Calcium. I am a C and I was afraid it would cause more C and more unforcomfortable symptoms. I bought the tums PMS formula and I began taking it according to the directions on the bottle; two in the a.m. and two in the p.m. I actually wanted to try it for PMS symptoms and I only have taken 6 so far. Four yesterday and two this a.m. The pain in my upper right quandrant is better and I feel less G is trapped in my intestines. It made me very tired last evening after I took two after dinner. It was a strange effect but I believe it helped to relax my stomach. I don't know for sure but I hope it continues to help.I am going to add a magnesium supplement beginning today as well.