Levothyroxine dosing reference and regimen planner — independent, non-promotional, for general information
Already know the daily dose?
Enter it here to compare exact tablet regimens straight away — no weight, age or other details needed. Use exactly as advised by your doctor.
Target daily dose
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Don't know the dose? Open the Dose calculator tab to work out a reference dose from weight, age and indication.
Reference, not a prescription. Weight does not give an exact maintenance dose.
Daily consistency comparison
Compare the actual dose swallowed each day. A fixed regimen uses the same dose every day; an alternating regimen requires different doses on different days.
Option A (precision levothyroxine) 25 / 50 / 100 mcg may be divided into equal halves per the supplied product information; halving 25 mcg enables 12.5 mcg increments. Only 0.5 steps — no quarters. Option B is treated as non-splittable in this user-defined comparator scenario, not as a universal market fact.
Automatic mode is not available for this profile, so no dose and no comparison are shown. Switch to clinician-defined dose to continue.