Levothyroxine Starting Dose and Titration Step (FDA Label)
The levothyroxine starting dose and titration step on the Synthroid label.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Patient group
- Adult
- Weight
- 70 kg
Result: The Synthroid label's full replacement dose is 1.6 mcg/kg/day: 112 mcg a day at 70 kg (112 mcg is a tablet strength).
The tool opens with these values already filled in. Replace them with your own.
What you enter
- Patient group
- Weight
- Children: at risk for hyperactivity, yes or no
How this is calculated
Citation
FDA label on DailyMed: Synthroid (levothyroxine sodium) tablets, section 2.3, Tables 1 and 2 (dosing guidelines for hypothyroidism in adults and pediatric patients), and section 3 (tablet strengths). Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.