Levothyroxine (Synthroid) is an oral medication used to treat hypothyroidism (underactive thyroid). It's a lab-made version ...

Levothyroxine is a generic drug that’s prescribed for various conditions, including hypothyroidism in adults and some children. Levothyroxine comes in several forms. The dosage can vary ...

A new study suggests that levothyroxine sodium is being prescribed to boost the thyroid function even among patients with borderline high levels of the thyroid-stimulating hormone thyrotropin.