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Pharma Intelligence, Simplified

Data updated: Mar 10, 2026

LEVOXYL

LEVOTHYROXINE SODIUM
Oncology Approved 2001-05-25
1
Indication
--
Phase 3 Trials
24
Years on Market

Details

Status
Prescription
First Approved
2001-05-25
Routes
ORAL
Dosage Forms
TABLET

Companies

Active Ingredient: LEVOTHYROXINE SODIUM

LEVOXYL Approval History

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What LEVOXYL Treats

2 indications

LEVOXYL is approved for 2 conditions since its original approval in 2001. These indications span multiple therapeutic areas including oncology, immunology, and more.

  • Hypothyroidism
  • Thyroid Cancer
Source: FDA Label

LEVOXYL Boxed Warning

NOT FOR TREATMENT OF OBESITY OR FOR WEIGHT LOSS Thyroid hormones, including LEVOXYL, either alone or with other therapeutic agents, should not be used for the treatment of obesity or for weight loss. In euthyroid patients, doses within the range of daily hormonal requirements are ineffective for weight reduction. Larger doses may produce serious or even life-threatening manifestations of toxicity, particularly when given in association with sympathomimetic amines such as those used for their ano...

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Key Completed Trials

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Completed studies with published results, ranked by significance

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Trial Timeline

Full development history with FDA approval milestones

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Understanding FDA Approval Types
Count Type What it means
- ORIG Original approval - drug first enters market
- SUPPL - Efficacy New indication (new disease/condition approved)
- SUPPL - Labeling Label text changes (warnings, dosing updates)
- SUPPL - Manufacturing Production changes (new facility)
- SUPPL - Chemistry Formulation changes (new dosage strength)

Green lines in the timeline show ORIG and Efficacy approvals - the clinically meaningful milestones.

LEVOXYL FDA Label Details

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Indications & Usage

FDA Label (PDF)

LEVOXYL is L-thyroxine (T4) indicated in pediatric and adult patients for: Hypothyroidism: As replacement in primary (thyroidal), secondary (pituitary), and tertiary (hypothalamic) congenital or acquired hypothyroidism. Pituitary Thyrotropin (Thyroid-Stimulating Hormone, TSH) suppression: As an adjunct to surgery and radioiodine therapy in the management of well-differentiated thyroid cancer. Limitations of Use : - Not indicated for suppression of benign thyroid nodules and nontoxic diffuse goiter in iodine-sufficient patients. - Not indicated for treatment of hypothyroidism during the recover...

โš ๏ธ BOXED WARNING

WARNING: NOT FOR TREATMENT OF OBESITY OR FOR WEIGHT LOSS Thyroid hormones, including LEVOXYL, either alone or with other therapeutic agents, should not be used for the treatment of obesity or for weight loss. In euthyroid patients, doses within the range of daily hormonal requirements are ineffectiv...

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Data Sources

Data sourced from official FDA and NIH databases. Click links to verify on original sources.