Levothyroxine Dose Calculator
Estimate initial levothyroxine (T4) replacement dose for hypothyroidism based on weight and clinical indication.
How to Use
- Enter patient weight in kg.
- Select the dose type based on clinical indication.
- Click Calculate to see the estimated starting dose.
使用例
- •Hypothyroidism treatment initiation.
- •Post-thyroidectomy replacement.
- •Subclinical hypothyroidism management.
計算式
Full replacement: 1.6 mcg/kg/day. Elderly/cardiac: 0.5 mcg/kg/day. Subclinical hypothyroidism: 25–50 mcg/day fixed.
よくある質問
What is the standard levothyroxine dose?
Full replacement is typically 1.6 mcg/kg/day. Elderly patients and those with cardiac disease should start at 0.5 mcg/kg/day or 12.5–25 mcg/day.
How often is the dose adjusted?
TSH should be rechecked 6–8 weeks after initiation or dose change and the dose adjusted to normalize TSH.
Disclaimer
For educational purposes only. Does not replace professional medical evaluation.