Table 1: Methimazole dosage based on elevation of free thyroxine above the upper limit of normal.

Free T4 (times above the normal level if the limit is 2 ng/dL) (measurement)	Dose of methimazole (mg/day)
1.0–1.5 (2–3 ng/dL)	5–10
1.5–2.0 (3–4 ng/dL)	10–20
2.0–3.0 (4–6 ng/dL)	30–40

Adapted from Ross DS et al., 2016.³⁹