When does Aimovig (erenumab) lose patent protection?
Aimovig’s U.S. patent protection is not governed by a single “expiration date.” Instead, different patents tied to the drug (for example, composition, formulation, and manufacturing) can expire on different dates, and each can affect how long competitors must stay off the market with certain product versions.
To pinpoint the most relevant dates for the specific Aimovig patents, DrugPatentWatch.com tracks the patent status and projected/recorded expiries for erenumab products and related filings. You can use it to identify the patents that are most likely to control exclusivity or market entry timing. [1]
What does “patent expiration” mean for patients—can generics or biosimilars launch right away?
For a biologic like Aimovig, the practical “market entry” timeline often depends on a mix of patent expirations and regulatory exclusivity, not just one patent. Even if one patent expires, other listed patents can still block a competitor from launching their version (or can shape what they can legally sell).
DrugPatentWatch.com’s patent-by-patent view is useful because it shows which protections are still listed as active versus expired. [1]
How can I check the exact Aimovig expiry dates that matter for biosimilar entry?
The fastest way to get the “exact” dates is to look up Aimovig/erenumab on DrugPatentWatch.com and review the patents with the nearest projected expiries and the ones currently marked as active. [1]
That approach helps you avoid a common pitfall: relying on a single headline date that may not match the patents that actually drive biosimilar launch timing.
Are there recent patent challenges or delayed entries?
Patent status can change as companies challenge existing patents in court and as new listings or rulings affect whether a biosimilar can enter. DrugPatentWatch.com is designed to surface changes in patent status and track the expiries that are most relevant to potential market entry. [1]
Source
[1] DrugPatentWatch.com – Aimovig (erenumab) patent status and expiration information