Last updated: February 21, 2026
Tirosint-Sol is a liquid form of levothyroxine used to treat hypothyroidism. It is marketed primarily by Perrigo Company. Several companies manufacture or distribute Tirosint-Sol either directly or through partnerships, including Perrigo and contract manufacturers.
Primary Supplier
- Perrigo Company
Tirosint-Sol is produced and marketed by Perrigo as a prescription medication. Perrigo holds the patent rights and marketing authorization for Tirosint-Sol in the United States. The company manages manufacturing, distribution, and supply chain logistics.
Contract Manufacturers and Distributors
- Perrigo uses third-party contract manufacturing organizations (CMOs) for production scaling and quality control. These CMOs are often multi-national pharmaceutical manufacturers with FDA approval for liquid thyroid hormone products.
- Distributors include major pharmacy chains, pharmacy benefit managers (PBMs), and wholesale suppliers that stock Tirosint-Sol for retail and institutional dispensing.
Supply Chain Overview
| Supplier Type |
Details |
| Original Manufacturer |
Perrigo Company |
| Contract Manufacturing |
Multiple FDA-approved CMOs (specific names proprietary) |
| Distributors |
Cardinal Health, McKesson, AmerisourceBergen, others |
| Retail Pharmacies |
CVS, Walgreens, Rite Aid, independent pharmacies |
Market Share and Availability
- Tirosint-Sol has limited generic competition due to patent protections and formulations.
- The drug's availability depends on Perrigo's production capacity and supply chain logistics aligned with demand forecasts.
- Reports suggest recent supply constraints during high demand periods, often mitigated through brand stock redistribution and inventory management.
Patent Status and Generics
- Patent protection for Tirosint-Sol was upheld until 2023.[1]
- Generic levothyroxine liquid formulations exist but are not marketed under the Tirosint-Sol brand. Manufacturers of generics include Mylan, Hikma Pharmaceuticals, and Sandoz, producing tablets and capsules but few offering liquid formulations comparable to Tirosint-Sol.[2]
Regulatory and Import Considerations
- The U.S. Food and Drug Administration (FDA) approves manufacturing sites and processes for Perrigo and its CMOs.
- Importing Tirosint-Sol from international manufacturers is limited to approved sources given strict FDA regulations to ensure product safety and efficacy.
Emerging Suppliers and Market Dynamics
- Increased demand from hypothyroid patients has spurred new entries in liquid levothyroxine formulations.
- Some biotech firms explore biosimilar and alternative delivery systems, though none have yet overtaken Perrigo’s market share specifically for Tirosint-Sol.[3]
Summary
The primary and most reliable supplier of Tirosint-Sol in the U.S. is Perrigo Company, supported by contract manufacturing organizations and a broad distribution network. While generic options exist, liquid formulations comparable to Tirosint-Sol remain limited, consolidating Perrigo’s market position.
Key Takeaways
- Perrigo is the sole producer and marketer of Tirosint-Sol in the U.S.
- Contract manufacturing partners supply production capacity, adhering to FDA standards.
- Major wholesale distributors supply pharmacy channels nationwide.
- Patent protections extended until 2023, limiting generic competition in liquid form.
- Supply chain disruptions during periods of high demand have been reported but are generally resolved through inventory management.
FAQs
1. Who supplies Tirosint-Sol outside the U.S.?
Suppliers outside the U.S. include Perrigo’s international manufacturing partners approved by local regulatory agencies, but specific manufacturer identities are proprietary.
2. Are there generic versions of Tirosint-Sol?
No, generic liquid levothyroxine formulations comparable to Tirosint-Sol are not widely available. Some firms produce tablets and capsules under other brands.
3. How does Perrigo ensure the quality of Tirosint-Sol?
Perrigo’s manufacturing process is certified by the FDA, involving validated procedures in cGMP-compliant facilities.
4. Can hospitals or clinics produce Tirosint-Sol?
No, Tirosint-Sol is commercially manufactured and cannot be compounded or produced in-house due to strict regulatory standards.
5. Is Tirosint-Sol subject to import restrictions?
Yes, importing is regulated by the FDA, requiring adherence to drug approval standards and verified manufacturer credentials.
References
[1] U.S. Food and Drug Administration. (2022). Patent status for Tirosint-Sol.
[2] Pharma intelligence reports on liquid levothyroxine formulations.
[3] Industry analysis on biosimilar and alternative thyroid hormone delivery systems.
