CALCIUBONE VITA 3 is a combination medication that is used to prevent or treat low blood calcium levels (hypocalcemia) in people who do not get enough calcium from their diets. It can also be used to treat conditions caused by low calcium levels such as bone loss (osteoporosis), weak bones (osteomalacia/rickets), decreased activity of the parathyroid gland (hypoparathyroidism), and a certain muscle disease (latent tetany).