PTH and Hypocalcemia: None of the patients had permanent hypoparathyroidism with low serum calcium and PTH after six months of continuous use of calcium tablets and vitamin D. Conversely, of the patients who underwent total thyroidectomy, 15 (7.8%) and three (1.6%) developed transient and permanent hypocalcemia with the use of medicine within one year and beyond one year, respectively (Table 2).