A Case of Refractory Hypothyroidism due to Poor Compliance Treated with the Weekly Intravenous and Oral Levothyroxine Administration

Figure 1

Serum thyroid hormone and TSH levels after the intravenous administration of a single bolus of LT4 (100 g). Serum FT4 and total T4 levels both increased, peaked 1 hour after the administration, and gradually decreased thereafter.