Starting Dose Guide
Levothyroxine Starting Dose — What to Expect
Always follow your prescriber's specific dosing instructions. Starting doses vary based on your individual health, age, weight, kidney function, and other medications. This is general guidance only.
Common Levothyroxine Doses
25mcg (typical start)50mcg75mcg88mcg100mcg112mcg125mcg137mcg150mcg175mcg200mcg300mcg
Your prescriber will determine the right starting dose for you.
Starting Levothyroxine — What to Expect Week by Week
- Week 1-2: Start at 25mcg. Side effects are most common early — most improve significantly.
- Week 2-4: Your body adjusts. Report persistent or severe side effects to your prescriber.
- Week 4-6: First follow-up appointment — prescriber evaluates response and may adjust dose.
- Month 2+: Stable dosing established. Recheck at 3 months, then annually.