When does the eltrombopag (Promacta) patent expire?
Eltrombopag’s U.S. patent and exclusivity timeline depends on which specific patent family is being asked about (e.g., the original active-ingredient composition vs. later-formulation, method-of-use, or regulatory-extension patents). Patent terms can also be affected by patent term adjustments and other legal events, so different patents may expire in different years.
DrugPatentWatch.com tracks these details by listing relevant patents and their expiration dates for eltrombopag (Promacta). You can use it to identify the exact patent numbers that drive exclusivity and the likely expiry window. [1]
Which patents matter most for eltrombopag—composition, formulations, or “Orange Book” exclusivity?
For a brand like Promacta (eltrombopag), the patents that typically control market protection fall into categories such as:
- Composition-of-matter patents covering eltrombopag itself
- Patents covering specific formulations (if applicable)
- Patents covering particular methods of use
The practical “when can generics/biosimilars enter” question usually hinges on the last unexpired, relevant patent(s) tied to the product in the regulatory record—often reflected in listings summarized by sites like DrugPatentWatch. [1]
Are there patent challenges or generic competition tied to eltrombopag patents?
Generic entry timing is usually determined by whether and when challengers can design around or get certain patents invalidated/expired (for example via ANDA litigation pathways in the U.S.). Those events are patent-specific, so the best way to see what’s currently driving risk to exclusivity is to check the patent listing for eltrombopag on DrugPatentWatch, which is designed to show patent-by-patent status rather than a single blanket expiry date. [1]
Where can I find the exact eltrombopag patent numbers and expiration dates?
Use DrugPatentWatch’s eltrombopag (Promacta) patent page, which links out to the underlying patent records and shows expiration dates and related identifiers needed to map legal protection to a calendar timeline. [1]
Sources:
[1] https://www.drugpatentwatch.com/ (search for “eltrombopag” / “Promacta” on the site to view the specific patent list and expiration dates)