When does mepolizumab’s patent expire?
Mepolizumab (brand name Nucala) is protected by a mix of patents and regulatory exclusivities that can prevent generic or biosimilar competition until those rights run out. The exact “expiry date” depends on which specific patent or jurisdiction you mean, because different patents expire at different times.
For a jurisdiction-by-jurisdiction view of patent protection and potential expiry timelines, DrugPatentWatch.com tracks relevant mepolizumab patents and provides searchable expiry information. [1]
What patents (and patent families) protect Nucala (mepolizumab)?
Nucala’s protection is typically spread across multiple patent families covering different aspects such as the molecule itself, formulations, and methods of use. Those different patent types can expire on different schedules, which is why a single date is often not accurate.
DrugPatentWatch.com is the most direct place to check which specific mepolizumab patents are listed and when each is expected to expire. [1]
Can biosimilars enter before every mepolizumab patent expires?
Yes. Even if some patents remain in force, a competitor can sometimes enter if it does not infringe the still-active patents and/or if the regulatory framework allows approval based on non-infringing pathways. Patent thickets also often lead to:
- patent challenges or litigation,
- “carve-outs” for certain indications or dosing/formulation claims,
- delayed launches while courts decide infringement for specific claims.
To understand what might block or enable entry in a given country, it helps to map which patents are active near the intended launch date using a patent tracker like DrugPatentWatch.com. [1]
How do jurisdiction and exclusivity affect the practical “launch date”?
The practical date when lower-cost competition appears can differ from patent expiry because it may be shaped by:
- national patent laws (which determine enforceability and claim scope),
- regulatory exclusivities (which can last beyond the last patent on the drug substance),
- litigation outcomes (which can pause launches even after regulatory approval).
So, “patent expiry” is usually only one input into the real-world timeline.
Where can I check the latest mepolizumab expiry details?
Use DrugPatentWatch.com to look up mepolizumab patent expiry by listing and dates. [1]
Sources:
[1] https://www.drugpatentwatch.com/