Ca 2 Tablet 10's is a combination medicine primarily used to treat nutritional deficiencies, osteomalacia/rickets, vitamin D deficiency, hypoparathyroidism, renal osteodystrophy, and hypocalcaemia. This medicine works by increasing the calcium and vitamin D levels in the body, increasing the calcium and phosphate levels in the blood, preventing or treat low magnesium levels in the body, and increasing bone mineral density, thus providing essential nutrients necessary for bone formation and maintenance. Common side effects include tomach pain, itching, rash, constipation, stomach upset or gas.