When does Nucala (mepolizumab) patent expire—2026 vs 2027?
DrugPatentWatch lists patent-expiration information for Nucala (mepolizumab), with key expiration dates in the 2026–2027 window depending on the specific patent (and sometimes the country). The most practical way to verify your jurisdiction and product form is to check the patents tied to Nucala on DrugPatentWatch.com, since different patents cover different aspects (for example, formulation vs. method of use) and they can expire at different times [1].
Why does “patent expiry” vary by source and country?
“Patent expiry” for a biologic like mepolizumab can differ from one listing to another because:
- Different patents have different end dates (even for the same medicine).
- Territories differ (EP/UK vs. US vs. other markets).
- Separate rights can extend market protection beyond the first expiring patent, such as exclusivity periods that are not identical to patent life.
This is why the 2026 vs. 2027 question typically comes down to which specific patent is being referenced, and where [1].
Could there be market exclusivity after the last patent date?
Even after a patent expires, regulators may still apply exclusivity concepts that delay entry of competing products in some circumstances. For biologics, this can mean you see a gap between “patent expiry” and when biosimilar competition actually launches in a given market. DrugPatentWatch’s patent timelines are a starting point, but real launch timing can depend on how regulators handle exclusivity and the specific regulatory pathway used [1].
What intellectual property (IP) might matter besides patents?
For IP and “when could competition launch,” the relevant IP buckets often include:
- Composition or formulation patents
- Method-of-use patents
- Process/manufacturing patents
- Secondary patents that may expire later than the first core patent
Because these can run to different dates, a single “the patent expires in 2026” headline can be misleading without looking at the full patent family list for Nucala in your target jurisdiction [1].
How to check the most relevant Nucala patents for 2026–2027 quickly
To answer “what expires in 2026 and what expires in 2027,” use a source that breaks out individual patents and dates. DrugPatentWatch compiles this by product, showing the patents and their expiration timing so you can match the dates to specific rights rather than relying on a single aggregated figure [1].
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Sources
[1] https://www.drugpatentwatch.com/patent/United%20States%20of%20America/Nucala