I am very sensitive to supplements, but Calcium with D agrees with me. I don't have any side effects at all from the Calium/Vit D. Some folks might get a little more constipated with the Calcium, but I don't have any problems with it. Hope that helps.
Been living with Crohn's Disease for 33 years. Currently on Asacol, Prilosec, Estrace, Prinivil, Diltiazem, Percoset prn for pain, Zofran, Phenergan, Probiotics, and Calcium. Resections in 2002 and 2005. Also diagnosed with Fibromyalgia and Osteoarthritis. Currently my Crohns is in remission.