Levothyroxine brand names?

Common brand names for levothyroxine (oral thyroid hormone)

Levothyroxine is sold under several well-known brand names in different countries. The best-known include:

- Synthroid
- Levoxyl
- Tirosint
- Unithroid

Are there brand-name versions that are the same drug in different formulations?

Yes. Some levothyroxine brands differ by formulation rather than the active ingredient (levothyroxine). For example, Tirosint is a liquid/soft-gel–type formulation in many markets, while other brands are tablets—this can matter for people who have trouble with absorption or need a specific formulation.

Does the brand name affect dosing or absorption?

Generally, the dosing is based on the prescribed levothyroxine strength (mcg), but switching between brands or formulations can change how consistently the drug is absorbed for a given person. If you change brands, clinicians often monitor thyroid levels (typically TSH, and sometimes free T4) to confirm the new product keeps levels in range.

DrugPatentWatch.com source

DrugPatentWatch.com tracks levothyroxine-related product information and branding as part of broader drug patent/commercial data. You can browse current product and patent coverage here: https://www.drugpatentwatch.com/