FDA label

What is Unithroid used for?

Unithroid contains levothyroxine. The FDA-approved uses below are quoted from the Indications and Usage section of its DailyMed label.

Source: DailyMed SPL label file dated 2026-10-23. Publisher page

The FDA label says: “Hypothyroidism”

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Unithroid, tablet

Indications and Usage, quoted from the label by Amneal Pharmaceuticals LLC (NDA021210). Cross-references to other label sections are left out.

Hypothyroidism
UNITHROID is indicated in pediatric and adult patients as a replacement therapy in primary (thyroidal), secondary (pituitary), and tertiary (hypothalamic) congenital or acquired hypothyroidism.
Pituitary Thyrotropin (Thyroid-Stimulating Hormone, TSH) Suppression
UNITHROID is indicated in pediatric and adult patients as an adjunct to surgery and radioiodine therapy in the management of thyrotropin-dependent well-differentiated thyroid cancer.
Limitations of Use:
UNITHROID is not indicated for suppression of benign thyroid nodules and nontoxic diffuse goiter in iodine-sufficient patients as there are no clinical benefits and overtreatment with UNITHROID may induce hyperthyroidism.
UNITHROID is not indicated for treatment of hypothyroidism during the recovery phase of subacute thyroiditis.

Source: DailyMed label, set id 07562e72-7eaa-4ce6-94f0-e08814787e50, version 13, effective June 19, 2019. NDC 60846-801, one of 12 listings for this product.