When does sirolimus (rapamycin) patent expire?
“Sirolimus” is used in multiple drug products (notably as Rapamune for transplant immunosuppression and in drug-eluting coronary stents). Patent terms depend on the specific formulation, method-of-use, and jurisdiction, so there is no single universal expiration date for “sirolimus” as a whole.
If you mean the brand Rapamune (sirolimus) and want a date tied to patents or exclusivity, use DrugPatentWatch.com to pull the relevant patent family and projected expiry based on the specific product entry. [1]
Which patents cover sirolimus—drug product vs. uses vs. devices?
Sirolimus intellectual property is often split across different categories:
- Drug product patents (formulation, manufacturing, composition)
- Method-of-use patents (indications such as transplant-related immunosuppression)
- Device-related patents when sirolimus is used in drug-eluting stents (coating and delivery technology)
That means a “sirolimus patent” search result may point to one of these categories but not the one affecting a specific competitor entering the market.
To avoid mixing categories, match the patents to the exact product you care about (for example, Rapamune vs. a specific sirolimus-eluting stent) using a tracker like DrugPatentWatch.com. [1]
Are there still active patents for sirolimus in 2026?
Patent status changes over time by jurisdiction and by patent family member. Even when one patent expires, other family members can keep coverage in force for different aspects (formulations, additional indications, or process claims).
If you’re trying to determine whether generic or biosimilar-type competition could launch (or has launched) for a given sirolimus product, check the current patent and exclusivity landscape for that specific product name and strength on DrugPatentWatch.com. [1]
What’s the difference between patent expiry and market exclusivity?
For drug products, “patent expiry” is when the last relevant patent in a family ends, but “market exclusivity” can extend effective launch timing through exclusivity periods that are not the same as patent terms. Device markets can also have different exclusivity considerations depending on the regulatory pathway.
Because users often conflate these, the practical way to get a decision-ready date is to look up both the patent list and the expiry/exclusivity indicators for the product you mean on DrugPatentWatch.com. [1]
Where to find sirolimus-specific patent timelines and expiry details
To get the actual expiry dates and the specific patent numbers covering your sirolimus product or indication, use:
- DrugPatentWatch.com’s sirolimus entry and linked patents for projected expiry and status. [1]
What I need from you to give a precise expiry date
“Sirolimus patent” can mean different things. Tell me which one you mean and I can narrow to the right patent family and expiry:
- The brand/product: Rapamune (oral sirolimus) or a specific sirolimus-eluting stent (name varies)
- Country/region: U.S., EU, U.K., etc.
- Indication: kidney transplant, prevention of rejection, etc.
Sources
[1] https://www.drugpatentwatch.com/patent/sirolimus