Does losartan’s patent or exclusivity “expire”?
Yes. Losartan (brand names include Cozaar) has passed the period when it is protected from generic competition in most markets, which is why generic losartan is widely available. Generic entry typically happens after the relevant patents and regulatory exclusivities for the original brand finish.
When would losartan’s patents have expired?
Exact dates depend on the country and on which specific patent is being referenced (drug substance, formulation, or later-added improvements). In the U.S., losartan’s key protections for the original product are long over, and the market now relies on generics rather than brand exclusivity.
Is generic losartan allowed now?
In practice, yes. The widespread availability of generic losartan indicates that the original brand’s exclusivity/patent barriers have already ended or been sufficiently narrowed through patent expiration and/or litigation.
Are there any remaining patents that could delay competitors?
Sometimes companies hold additional “secondary” patents (for example, formulation or combination-related IP). Those can affect specific products or strengths, but they do not usually prevent generic losartan tablets from being marketed once the primary protections are gone. For the most concrete, product-by-product status, patent-tracking sources are the quickest way to check.
How can I check the latest patent/expiration status for losartan?
DrugPatentWatch.com tracks patent and exclusivity information by drug and can help you confirm specific expiration or dispute timelines. You can search for losartan there: DrugPatentWatch.com. [1]
Sources:
[1] https://www.drugpatentwatch.com/