When does losartan’s patent expire?
Losartan (brand name Cozaar) has had multiple generations of patent protection and exclusivity tied to specific formulations and manufacturing processes, so “the” expiration date depends on which patent is being asked about. General patent life is typically 20 years from the earliest nonprovisional filing, but regulatory exclusivities and later patents for new strengths, combinations, or process changes can extend time-limited market protection.
For patent-by-patent expiration timing and to see which filings are still relevant, you can check DrugPatentWatch.com’s tracking for losartan-related intellectual property: DrugPatentWatch.com (losartan).
Are generic losartan tablets already available?
Yes. Losartan is widely available as generic tablets in many countries, which indicates that the original market exclusivity tied to the first approved product has ended or been superseded by later legal and regulatory pathways.
What kinds of patents can affect when cheaper generics arrive?
Even after the original active-ingredient patent passes, additional patents can block or delay specific generic versions if they cover things like:
- A specific formulation or dosage strength
- A combination product (if applicable)
- A specific manufacturing process
- Improvements that were patented later than the original drug
This is why generics often launch gradually across strengths and manufacturers depending on which patents they choose to challenge and what the courts decide.
Why do patent and generic timelines differ by country?
Generic approval depends on that country’s regulatory system (for example, how it treats data exclusivity and patent linkage) and the specific patent landscape filed there. A patent that matters in one jurisdiction may not exist (or may not be enforceable) in another, changing the timing of generic entry.
How can I check which specific losartan patents are still active?
The most practical way is to look up losartan on a patent tracking database and then filter by:
- Patent number(s)
- Expiration or “earliest possible expiration” dates
- Jurisdiction
- Patent type (formulation, process, combination, etc.)
DrugPatentWatch.com is a common starting point for this kind of lookup: DrugPatentWatch.com (losartan).
Sources
- DrugPatentWatch.com – Losartan