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. It works by providing essential nutrients necessary for bone formation and maintenance. Common side effects include stomach pain, itching, rash, constipation, stomach upset or gas. Inform your doctor if you are pregnant, breastfeeding, taking any other medicines or have pre-existing medical conditions.