A metabolic laboratory panel shows a free thyroxine (T4) lev…

A metabolic laboratory panel shows a free thyroxine (T4) level (0.2 ng/dL);  reference range, (0.8–1.7 ng/dL) and a thyroid-stimulating hormone (TSH) level (8 µIU/mL;  reference range, (0.4–4 µIU/mL).   The nurse evaluates the labs and anticipates the HCP will order which of the following medication?