levothyroxine sodium
Drug ingredientThis chemical is an active pharmaceutical ingredient used in FDA-regulated drugs.
Where It Comes From
57 FDA-registered drug labelers
A-S Medication Solutions
AbbVie Inc.
AbbVie Ireland NL B.V.
Accord Healthcare Inc.
Alvogen, Inc.
American Health Packaging
Amneal Pharmaceuticals LLC
Amneal Pharmaceuticals NY LLC
ASCLEMED USA INC.
Aurobindo Pharma Limited
Aurore Pharmaceuticals Private Limited
Azico Biophore India Private Limited
Bryant Ranch Prepack
Camber Pharmaceuticals, Inc.
Cardinal Health 107, LLC
Coupler LLC
DIRECT RX
Excella GmbH & Co. KG
F.I.S. FABBRICA ITALIANA SINTETICI S.P.A.
Fagron Inc
Fresenius Kabi USA, LLC
Hikma Pharmaceuticals USA Inc.
IBSA Pharma Inc.
Lannett Company, Inc
LETCO MEDICAL, LLC
LUPIN LIMITED
Lupin Pharmaceuticals, Inc.
Macleods Pharmaceuticals Limited
Major Pharmaceuticals
Medisca Inc.
MSN Laboratories Private Limited
Mylan Institutional Inc.
Mylan Pharmaceuticals Inc.
NCS HealthCare of KY, LLC dba Vangard Labs
Neolpharma, Inc.
NorthStar RxLLC
Northwind Health Company, LLC
NuCar Pharmaceuticals,Inc.
NuCare Pharmaceuticals, Inc.
Oliva Therapeutics, LLC
PD-Rx Pharmaceuticals, Inc.
Peptido GmbH
Pfizer Laboratories Div Pfizer Inc
Preferred Pharmaceuticals Inc.
Professional Compounding Centers of America
Proficient Rx LP
Provell Pharmaceuticals, LLC
Redpharm drug
RedPharm Drug, Inc
REMEDYREPACK INC.
Sandoz GmbH
Spectrum Laboratory Products, Inc.
Teva Pharmaceuticals, Inc.
VALARY LAB PRIVATE LIMITED
Viatris Specialty LLC
XLCare Pharmaceuticals, Inc.
YARAL Pharma Inc.
Why It Matters
Sectors
Health
Downstream Uses
Appears in 10 drug and cosmetic product listings (FDA).
- •Levothyroxine Sodium
- •Tirosint
- •Tirosint SOL
- •Synthroid
- •Levoxyl
- •Unithroid
- •LEVO-T
- •Euthyrox
Show all 10
- •Ermeza
- •Thyquidity
FDA Shortage Status
Whether any manufacturer currently reports this drug as in shortage on the FDA Drug Shortages database. "Active Shortage" means at least one presentation has status "current."
No Shortage
Shortage History
Each row is a separate manufacturer's FDA shortage filing — not a timeline for the drug as a whole. Multiple "current" entries are normal: each manufacturer/NDC files independently. Status reflects the manufacturer's report; reason describes their supply situation (Available, Unavailable, or to be discontinued).
to be discontinued
Levothyroxine Sodium Tablet
07/10/2025Vendor Pricing
$7.10/gCombi-Blocks, Inc.
CountryUnited States
Pack$710.00 / 100 g
Purity95%
Vendors18 available
Prices reflect listed pack sizes. Small research packs run far above bulk rates.
17 more vendors
| Vendor | Country Supplier country. Where available, shows shipping origin. When the supplier ships from a different country than where they are registered, both are shown. Most suppliers show registration country only. | $/g | Pack | Purity |
|---|---|---|---|---|
| A2B Chem LLC | United States | $7.12 | 25 g | 95% |
| AA BLOCKS | United States | $7.96 | 100 g | 95% |
| AK Scientific, Inc. | United States | $14.40 | 5 g | 98% |
| Aaron Chemicals LLC | Hong Kong | $18.64 | 25 g | 99% |
| AstaTech, Inc | United States | $19.80 | 25 g | 95% |
| Angene Chemical | China → Hong Kong | $21.36 | 25 g | 99% |
| Angene International Limited | United States | $29.20 | 5 g | 98% |
| MedKoo Biosciences, Inc | United States | $50.00 | 25 g | 98% |
| Molnova | China | $56.00 | 1 g | 99% |
| TargetMol Chemicals | China → United States | $62.00 | 1 g | 99.56% |
| MedChemExpress MCE | Sweden | $98.01 | 1 g | 99.75% |
| Labotest KG | Germany | $217.80 | 5000 mg | 90% |
| AA BLOCKS (2 weeks) | United States | $428.00 | 250 mg | 95% |
| A2B Chem LLC (2 weeks) | United States | $512.00 | 250 mg | 95% |
| Apexbio Technology LLC | United States | $1290.00 | 100 mg | 99.73% |
| Otava, Ltd. (2 weeks) | Ukraine | $2724.00 | 50 mg | 90% |
| Vitas M Chemical Limited | Hong Kong | $6250.00 | 20 mg | 90% |
Chemical Identity
CAS55-03-8
PubChem CID23666112
DTXSIDDTXSID90883228
FormulaC15H10I4NNaO4
Mol. Weight798.85 g/mol
SMILESC1=C(C=C(C(=C1I)OC2=CC(=C(C(=C2)I)O)I)I)CC(C(=O)[O-])N.[Na+]
Data Sources
236661122026-04-07
https://pubchem.ncbi.nlm.nih.gov/rest/pug/compound/name/levothyroxine sodium/cids/JSON
Archive: data/sources/pubchem_name/levothyroxine sodium.json
CAS 55-03-82026-04-24
https://www.epa.gov/tsca-inventory
Archive: data/sources/tsca/tsca_inventory.csv
CAS 55-03-82026-06-13
https://api.fda.gov/drug/shortages.json
Archive: data/sources/fda/shortages/shortages.json