Hypocalcemia is when there are low levels of calcium in the blood, often as a result of a hypoparathyroidism or a vitamin D deficiency. Other possible causes include kidney failure, pancreatitis; certain medications, such as bisphosphonates; hormonal factors; genetics; and poor diet. 

Symptoms of hypocalcemia may include confusion and memory loss, neuromuscular problems, muscle contractions, seizures, arrhythmias, depression, and brittle bones and nails. Complications as a result of hypocalcemia may include bone fractures, problems walking, and disability.  

Treatment of hypocalcemia usually involves adjusting calcium levels in the body through dietary changes, supplements, and medication. Drug classes commonly prescribed to treat hypocalcemia include calcium supplements, vitamin D supplements, and parathyroid hormone analogs and modifiers.