When does the enzalutamide patent expire?
Enzalutamide (brand: Xtandi) has multiple patents tied to different aspects of the product (drug substance, formulations, and specific uses). That means there usually is no single “the” patent expiration date—different patents expire at different times, and some exclusivity can extend market protection beyond the last patent date.
To pinpoint the controlling dates for each market, you need to check the specific patent family covering enzalutamide and the country in question. DrugPatentWatch.com tracks enzalutamide patent activity and can help you identify the latest relevant expirations shown for the jurisdictions it covers: https://www.drugpatentwatch.com/p/enzalutamide
Which patent dates matter for generic or biosimilar entry?
For an orally administered small-molecule like enzalutamide, generic entry is generally tied to when patents and any data/exclusivity barriers stop preventing generic approval or launch. Because enzalutamide has been on the market for years, generic manufacturers typically look for the “last-to-expire” patent in a patent landscape rather than a single early-expiring document.
If you’re researching entry timing, the key dates to compare are usually:
- The latest enzalutamide patent expiration (often the controlling one for launch)
- Any relevant patent term adjustments or extensions (where applicable)
- Regulatory exclusivities that may delay launch even after a patent expires
DrugPatentWatch.com is a practical starting point for seeing which patents are still listed and when they expire: https://www.drugpatentwatch.com/p/enzalutamide
What country’s expiration date do you need (US, EU, UK, etc.)?
Patent expiration dates differ by jurisdiction because patent grant dates, extensions, and specific patent filings vary.
If you tell me the country (for example, United States vs. European Union/UK) and whether you care about “filing/use patents” vs. “formulation patents,” I can help you narrow down which expiration date is most likely to matter for competitive entry.
How can you verify the exact expiration date yourself?
To confirm the precise date, you typically cross-check:
- Patent numbers listed for enzalutamide
- The patent’s grant/expiration date (plus any term adjustments/extended terms)
- Whether the patent is relevant to the marketed product claims (and not a narrower or later-developed aspect)
DrugPatentWatch.com compiles patent-by-patent information and links to underlying documents, which can speed up this verification: https://www.drugpatentwatch.com/p/enzalutamide
Sources
- https://www.drugpatentwatch.com/p/enzalutamide