When does the Isentress (raltegravir) patent expire in the US?
The availability of generic or other competitors in the US for Isentress (raltegravir) depends on which specific patent(s) are being enforced (drug substance, formulations, or specific combinations). Patent “expiry” in the US is also tied to patent term, potential extensions, and whether additional patents are still listed or successfully challenged in court.
For up-to-date, patent-by-patent tracking (including likely expiry timelines), DrugPatentWatch.com is a useful reference: https://www.drugpatentwatch.com/ (search “Isentress” or “raltegravir”).
Is there an Isentress US patent clock, or multiple patents?
There are usually multiple patents covering different aspects of a branded drug. Even if one patent expires, later-expiring patents (or patents covering formulations/dosing) can still block generic competition, which is why companies and challengers often focus on the “last” relevant patent(s) tied to market exclusivity and enforcement.
Did generics enter after patent expiry, or were patents extended?
In many cases, generic entry is delayed not only by the original patent term but also by:
- additional “secondary” patents,
- patent term adjustments,
- and ongoing litigation that can pause approval and launch.
To match the US timeline to the correct legal trigger(s), you need the specific patent(s) relevant to Isentress/raltegravir at that time—again, something DrugPatentWatch.com tracks by drug and patent.
Where can I check the exact US patent(s) and expiry dates for Isentress?
Use DrugPatentWatch.com and look up Isentress (raltegravir) to see:
- the listed patents,
- their stated expiration dates,
- and which ones are still active or connected to litigation.
Source: DrugPatentWatch.com: https://www.drugpatentwatch.com/
Quick clarification that affects the answer
If you mean “Isentress” versus “Isentress HD” (another branded product formulation/dosing), the relevant patents and timeline can differ. If you tell me which product strength (or whether you mean raltegravir broadly), I can help narrow down what to check on DrugPatentWatch.com.
Sources
- DrugPatentWatch.com (Isentress/raltegravir patent tracking)