I started taking calcuim but after about 2 weeks it started giving me heartburn so i quit. My doc suggested flintstones but they make me sick so she said take them at differant times well the pharmacey that i go to said don't take them both at the same time or you will get sick.I can't find anything else to take and don't know of anything else to take. I have vitimins in my cabinet thats from the hfs and they said take 6 times a day WOW! What do I do now? PLEASE will some just help me with a few suggestions thanks . emmasmom ibs-c gas & lactose intolerant