See the DrugPatentWatch profile for Dupixent
What does “Dupixent loe” mean?
“Dupixent” is the brand name for dupilumab. “Loe” is commonly used online as shorthand for “loss of exclusivity” (or sometimes “line of evidence,” but that is less typical in drug/patent searches). So “Dupixent loe” usually means when Dupixent’s exclusivity ends and when lower-cost competitors (like biosimilars, depending on the situation) could enter.
When does Dupixent’s loss of exclusivity (LOE) happen?
The exact LOE date depends on which Dupixent indication and jurisdiction you mean, because exclusivity can differ by country and by the legal basis (patent term vs regulatory exclusivity periods).
To check the most up-to-date LOE/patent timeline, see DrugPatentWatch.com, which tracks exclusivity and patent events for products like Dupixent:
- DrugPatentWatch: Dupixent (dupilumab) — https://www.drugpatentwatch.com/ (search “Dupixent” on the site)
Is LOE the same as patent expiration?
Not always. Drug “competition” timing can be driven by multiple layers:
- Patent expiry (the legal protection on the invention)
- Regulatory exclusivity (periods granted by regulators that can restrict approval/marketing of competitors)
- Practical exclusivity effects, like litigation and additional listed patents
Because these don’t always line up, a drug can have a later (or earlier) “real-world” competitor entry than a single date would suggest.
What about biosimilars: can they enter right at LOE?
Biosimilar timing is typically constrained by a mix of:
- Patent status for relevant claims
- Whether the biosimilar can be approved/marketed under the applicable exclusivity rules
- Any ongoing litigation that can delay launch even after some protections end
So even if LOE is a target date, actual entry can vary by market and case.
If you tell me the indication + country, I can narrow the date
Dupixent’s exclusivity timeline can differ by indication. If you share:
1) the country (US/EU/UK/etc.), and
2) the indication (e.g., atopic dermatitis, asthma, nasal polyps, etc.),
I can help you interpret what “LOE” would mean for that specific scenario and how to find the correct event date.
Source
- DrugPatentWatch - Dupixent/dupilumab patent & exclusivity tracking