See the DrugPatentWatch profile for Perampanel
What “perampanel patent” usually refers to
“Perampanel” (sold as Fycompa) is an anti-seizure medicine. When people search for “perampanel patent,” they usually mean one of these: when the original patents expire, whether patents cover specific uses or formulations, and whether generic or biosimilar versions can enter once exclusivity ends.
When do perampanel patents expire?
I can’t give an exact expiry date from the information provided here. Patent lifetimes depend on the filing and priority dates and on the country (e.g., US vs. EU vs. UK). Some rights also last longer because of patent term extensions or supplemental protections tied to regulatory approval.
If you tell me the country (and whether you mean the original product, a specific formulation, or a specific indication), I can narrow down the relevant patent families and explain how to interpret their expiry.
How patent expiry affects generic entry for Fycompa (perampanel)
Generic or marketed-competitor entry is typically linked to whether any enforceable patents or exclusivity protections remain in force. Even after the “main” compound patent expires, other patents (for example, methods of use, specific dosage forms, or crystalline forms) can still block full market entry in certain regions.
Are there patents beyond the main compound claim?
Yes, perampanel’s patent estate can include secondary patent types such as:
- specific dosing regimens or medical uses,
- formulation-related claims,
- manufacturing/process claims,
- other compound derivatives or specific polymorph/crystal forms (depending on the jurisdiction).
Which of these matter depends on what’s being challenged or relied on for market entry in that country.
Where to look up the exact perampanel patent (so you get the real dates)
To get the correct “perampanel patent” expiry timeline, you typically look up patent documents for:
- “perampanel” and “Fycompa”
- the company/assignee (often the brand’s originator)
- the jurisdiction you care about (USPTO for US, Espacenet/EPO for Europe, UKIPO, etc.)
If you share the country (and ideally the assignee or the specific product/form), I can help you identify the most relevant patent family and explain how the expiry dates relate to generic launch timing.
What I need from you to answer precisely
Reply with any one of the following, and I’ll tailor the patent expiry answer:
1) Country/region (US, EU, UK, etc.)
2) Whether you mean Fycompa tablets specifically (vs. another formulation)
3) Any assignee/company name you saw in your source
4) The patent number or link you’re looking at
Sources
No sources were provided in the prompt.