Work out tsh dose adjustment instantly with clear inputs, formula shown and shareable results.
Applies the conventional 12.5 to 25 microgram levothyroxine adjustment steps based on TSH, and shows the weight-based full replacement dose of 1.6 mcg/kg/day.
Levothyroxine adjustment
Full replacement = 1.6 mcg/kg/day; adjust by 12.5-25 mcg when TSH is outside target and retest after 6-8 weeks
Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.
Levothyroxine has a one-week half-life, so TSH takes about six weeks to reach a new steady state.
Yes. 12.5 mcg steps and higher TSH targets are usual in older adults and cardiac disease.