TSH-suppressive doses of levothyroxine are required to achieve preoperative native serum triiodothyronine levels in patients who have undergone total thyroidectomy

Abstract

Serum FT(3) levels during postoperative L-T(4) therapy were equivalent to the preoperative levels in patients with moderately suppressed TSH levels. Our study indicated that a moderately TSH-suppressive dose of L-T(4) is required to achieve the preoperative native serum T(3) levels in postoperative L-T(4) therapy.