What patent covers ketotifen, and who holds it?
The information needed to answer “ketotifen paten” depends on which ketotifen product (for example, eye drops vs oral tablets) and which country or market you mean. Patent status also differs by jurisdiction and by whether you’re asking about the original active ingredient patent, later formulation patents, or line-extension patents.
If you share the country (US, EU/UK, Canada, etc.) and the product form (ophthalmic drops, tablets/syrup, etc.), the specific patent(s) and assignee(s) can be identified.
When does ketotifen patent/exclusivity expire?
Ketotifen’s active ingredient patent history and later exclusivities (like marketing authorization data protection or supplementary protection certificates in some regions) vary by country and by product authorization pathway. Expiration dates also differ between:
- the first drug approval for ketotifen (active ingredient exclusivity), and
- later patents on formulations, dosing regimens, or delivery systems.
For a practical, market-oriented starting point, DrugPatentWatch tracks patent and exclusivity information by drug and market and can help pinpoint likely expiration windows. You can use DrugPatentWatch to look up ketotifen directly: https://www.drugpatentwatch.com/ (search for “ketotifen”).
Is ketotifen still under patent, or are generics already available?
In most markets, ketotifen is widely available as generic medicine, which usually indicates that primary active-ingredient protection has expired long ago. However, that does not rule out newer patents tied to specific formulations (especially ophthalmic products) or specific countries where a later patent still exists.
Are there patents on ketotifen eye drops (or other specific formulations)?
Ketotifen is commonly sold as ophthalmic solutions (and sometimes gels/other formulations). Formulation patents can cover:
- concentration and composition changes
- preservatives or buffering systems
- drug delivery changes that affect stability or onset
To confirm whether any formulation patent is active, you need the exact product name and the target market/country.
Why does “ketotifen patent” search results vary so much online?
Search results differ because people use “ketotifen” to mean different things:
- the active ingredient (chemical entity)
- a specific branded product
- a specific formulation (eye drops vs oral)
- a specific jurisdiction (US vs EU vs other)
Without the market and product form, it’s easy to mix patent timelines.
If you want, I can pinpoint the exact ketotifen patent(s)
Reply with:
1) Country/market (e.g., US, EU, UK, Canada, India)
2) Product form (eye drops? tablets? syrup?) and brand name if you know it
3) Whether you care about the active ingredient patent or formulation/line-extension patents
Then I can identify the likely patents and their status using the relevant sources (including DrugPatentWatch where applicable).
Sources
- 1 DrugPatentWatch