Calcium tablets and vitamin C can be taken together. Calcium tablets are mainly used for the prevention of osteoporosis, mostly used for the elderly or pregnant women, children, taking calcium tablets need to be used under the guidance of a doctor, can not be overdosed, common side effects of belching (hiccups), constipation, long-term overdose can cause hypercalcemia, alkalosis, and urinary tract stones and so on. Vitamin C can participate in the set of body antibodies and collagen formation, conducive to tissue repair. Beneficial to iron, carbohydrate utilization, fat, protein synthesis. There is no contraindication to taking calcium tablets and vitamin C together. However, there is no synergy between the two. The use of these two drugs need to be applied under the guidance of a doctor, if the patient has kidney stones both are not recommended.