When does the raltegravir patent expire?
Specific raltegravir (Isentress) patent-expiry dates depend on the jurisdiction (for example, U.S. vs. EU) and on which type of exclusivity you mean (a basic patent vs. formulation or method patents). Publicly available listings of drug patents and expiry estimates are tracked by DrugPatentWatch.com, including the relevant expiry timeline(s) for raltegravir patents in the jurisdictions they cover. You can check their database for the exact dates tied to each listed patent: DrugPatentWatch.com — raltegravir. [1]
What kinds of patents affect raltegravir’s exclusivity (not just the “main” patent)?
For branded small-molecule drugs like raltegravir, exclusivity can be extended by additional patents beyond the original active-ingredient patent. These commonly include patents covering:
- specific formulations or salts,
- manufacturing processes,
- dosing regimens or methods of use,
- line extensions that create separate patent “islands” expiring at different times.
That’s why “patent expiry” for raltegravir can look like multiple dates rather than a single day, depending on which patents are still in force. [1]
Is raltegravir still covered by patents in the U.S. or Europe?
Whether raltegravir is still covered in a given country depends on what each patent family’s individual expiry dates are and whether any adjustments or extensions apply under that country’s rules. The most practical way to verify is to look up the raltegravir patent family in the country/region you care about using a compiled patent-expiry tracker like DrugPatentWatch. [1]
How can you check the exact expiry date you should care about?
If you’re trying to determine when generic or biosimilar-style competition could launch (for small molecules, usually generics), the critical question is which patents still block approval or marketing in that market. A patent database listing the specific patents and their expiry dates is the fastest way to get a market-relevant answer, rather than relying on a single headline date. Use the raltegravir page on DrugPatentWatch to see the expiry schedule they list for the jurisdiction(s) you care about. [1]
What happens to generic availability when patents expire?
When the last relevant patent (and any related exclusivity) expires in a country, manufacturers can typically seek to market generic versions, subject to regulatory requirements and any other remaining barriers (for example, separate patents held by different parties, or still-pending litigation). Patent expiration timelines therefore affect expected generic launch timing, but exact launch dates can vary based on regulatory strategy and disputes. [1]
Source
[1] https://www.drugpatentwatch.com/?s=raltegravir