Thyroid medication treats hormone deficiency. Persistent fatigue may have other causes.
Check the basics of taking it
Take thyroxine on an empty stomach, usually 30 to 60 minutes before breakfast, away from tea, coffee, calcium and iron. Timing affects levels.
Other common causes of fatigue
Iron, B12 or vitamin D deficiency, insulin resistance, glucose swings and poor sleep (including sleep apnoea) can cause fatigue.
Questions for your next appointment
Ask whether your TSH, free T4, thyroid antibodies, iron, B12, vitamin D and blood sugar need checking.
Daily habits that help
Protein, strength training, regular sleep and daylight may support wellbeing; they do not replace medication.
Education, not personal medical advice. Consult a qualified clinician about diagnosis, treatment and your results.