Answer
Symptoms alone cannot reliably show whether thyroid replacement is too low, appropriate or excessive. Blood tests help assess control and guide prescribing.
Sources for this answer
- NHSNHS · NHS medicine guidance
- Levothyroxine 100 microgram tablets — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.