Menwall, 1st Check any current meds even over the counter to see what the side effects are. See if it is okay to take calcium with them. Stop all over the counter stuff that you can and do not take vitamins.2nd Be sure you have the right form of calcium. Calcium carbonate with vitamin D for starters. Or you can use the calcium carbonate with Vitamin D and other minerals.3rd Take them with food at least 4 or 5 hours apart.4th If your worse time is in the morning instead of taking the one with dinner take it at bedtime with a small snack.Be sure to start with 1/2 tablet at each of your 3 daily meals for the first 3 days to adjust.It is no cure only a control .LindaLinda (D-Type)If I don't take my calcium. Gall Bladder removed in 1976 and suffered with urgent diarrhea until I started calcium.lnapents###netscape.net