Calcitriol Calcium Carbonate Softgel Capsules have calcium carbonate, a form of vitamin D, as its two main active ingredients. Low calcium levels in the blood can be treated and prevented with the aid of these capsules. The dosage will vary depending on the patient's age, weight, health, and the degree of calcium deficiency. Calcitriol Calcium Carbonate Softgel Capsules is typically taken orally, with or without food. In addition to controlling the levels of calcium and phosphorus in the blood, calcitriol aids in the body's absorption of calcium from the diet.