Prescription
Thyroid hormone replacement
Levothyroxine Sodium
Last reviewed April 2026
Who is this for?
What is this drug?
Levothyroxine is a man-made version of the thyroid hormone that your body normally produces. It works by replacing or topping up the thyroid hormone when your thyroid gland (a small gland in your neck) is not making enough on its own.
What is it used for?
Underactive thyroid (hypothyroidism)thyroid hormone replacement after thyroid surgerygoitre (swollen thyroid gland in the neck)management of certain types of thyroid cancer
Prescription Required
A doctor's prescription is required to obtain this drug legally.