TABLE 2

Free T4 and TSH Values in Patient Taking Exogenous Thyroxine and Exhibiting Symptoms and Signs of Thyrotoxicosis

Free T4 (ng/dL)*TSH (IU/L)†
1.09.1
2.02.3
2.23.8
1.611.0
2.12.6
1.513.0
1.56.5
2.26.5
2.73.4
1.8‡3.7

  • ↵* Normal range = 0.7–2.0.

  • ↵† Normal range = 0.4–4.0.

  • ↵‡ Upper limit of this assay = 1.6 ng/dL.