Data / Drug companies / Liothyronine sodium
Liothyronine sodium: 19 companies and 51 products in the FDA NDC directory
Updated November 6, 2026. Source: US Food and Drug Administration, National Drug Code Directory (openFDA).
Liothyronine sodium is listed in the FDA National Drug Code Directory by 19 companies, with 51 products in commercial distribution. 45 of the products (88.2%) are marketed under an abbreviated new drug application (ANDA), the generic route. The most common dosage forms are tablet; injection, solution, and the newest product started marketing on November 21, 2025.
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- Companies listing it
- 19
- Products
- 51
- Generic (ANDA) products
- 45 (88.2%)
- Application numbers
- 8
- Routes
- Oral, Intravenous
- Brand names
- Cytomel, Liomny
- openFDA record search
- api.fda.gov
Companies that list liothyronine sodium
Ranked by number of products. Finished drugs in commercial distribution.
| Company | Products | Main dosage forms | Main marketing category | Newest product started |
|---|---|---|---|---|
| Bryant Ranch Prepack | 6 | tablet | Generic drugs (ANDA) | February 1, 2021 |
| Sigmapharm Laboratories, LLC | 6 | tablet | Generic drugs (ANDA) | November 21, 2025 |
| A-S Medication Solutions | 3 | tablet | Generic drugs (ANDA) | February 1, 2021 |
| Asclemed USA Inc. | 3 | tablet | Generic drugs (ANDA) | December 3, 2012 |
| Biocon Pharma Inc. | 3 | tablet | Generic drugs (ANDA) | February 12, 2024 |
| Dr. Reddy's Laboratories Inc. | 3 | tablet | Generic drugs (ANDA) | March 15, 2024 |
| Mylan Pharmaceuticals Inc. | 3 | tablet | Authorized generics (NDA) | June 24, 2019 |
| NorthStar Rx LLC | 3 | tablet | Generic drugs (ANDA) | May 5, 2021 |
| Pfizer Laboratories Div Pfizer Inc | 3 | tablet | New drug applications (NDA) | May 8, 1956 |
| Sun Pharmaceutical Industries, Inc. | 3 | tablet | Generic drugs (ANDA) | November 28, 2019 |
| Teva Pharmaceuticals USA, Inc. | 3 | tablet | Generic drugs (ANDA) | February 26, 2021 |
| Zydus Lifesciences Limited | 3 | tablet | Generic drugs (ANDA) | February 1, 2021 |
| Zydus Pharmaceuticals USA Inc. | 3 | tablet | Generic drugs (ANDA) | February 1, 2021 |
| Golden State Medical Supply, Inc. | 1 | tablet | Generic drugs (ANDA) | March 20, 2009 |
| NuCare Pharmaceuticals,Inc. | 1 | tablet | Generic drugs (ANDA) | December 3, 2012 |
| PD-Rx Pharmaceuticals, Inc. | 1 | tablet | Generic drugs (ANDA) | December 3, 2012 |
| Preferred Pharmaceuticals Inc. | 1 | tablet | Generic drugs (ANDA) | January 11, 2019 |
| Proficient Rx LP | 1 | tablet | Generic drugs (ANDA) | December 3, 2012 |
| XGen Pharmaceuticals DJB, Inc. | 1 | injection, solution | Generic drugs (ANDA) | August 17, 2005 |
Dosage forms
| Dosage form | Products | Share |
|---|---|---|
| Tablet | 50 | 98% |
| Injection, solution | 1 | 2% |
Marketing categories
| Marketing category | Products | Share |
|---|---|---|
| Generic drugs (ANDA) | 45 | 88.2% |
| Authorized generics (NDA) | 3 | 5.9% |
| New drug applications (NDA) | 3 | 5.9% |
Pharmacologic classes
| Class | Products |
|---|---|
| l-Triiodothyronine | 51 |
CC0 1.0 public domain dedication (openFDA). Counts are products in the FDA National Drug Code Directory on November 6, 2026: 138,262 products in commercial distribution, meaning without a marketing end date in the past. A company is a labeler code; one company can hold several codes, and the directory carries no address. Inclusion in the directory is not FDA approval, and the marketing category says under which kind of application or rule a product is sold. This page uses openFDA data and is not endorsed or certified by FDA. Free to reuse with credit to SpecStream under CC BY 4.0. Spot a wrong value? Write to [email protected] with the link to this page.