Figure 2.
Proposed algorithm for patients with elevated TSH and impaired bioavailability for LT4. Abbreviations: LT4, levothyroxine; T3, triiodothyronine; T4, thyroxine; TH, thyroid hormone; TSH, thyrotropin; p.r., per rectum; i.v., intravenous.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.