interferon alfa-2b (Intron A)
interferon alfa-2b is an FDA-licensed reference biologic from Merck Sharp & Dohme LLC.
Reference product
Intron A interferon alfa-2b
Merck Sharp & Dohme LLC
View full reference-product record- Approved
- Not listed
- Marketing
- Disc
- Center
- CDER
- Patents
- None listed
Molecular structure
Experimental 3D structure for interferon alfa-2b from the RCSB Protein Data Bank (PDB 1RH2).
Interactive biological assembly from PDB entry 1RH2. Drag to rotate, scroll to zoom, and inspect the full atomic structure right here, with no need to leave the page.
Exclusivity & patent cliffs
Orphan exclusivity ends
7-year orphan-drug exclusivity window.
in 70 yr 3 mo
interferon alfa-2b: frequently asked questions
Reference exclusivity, biosimilars, interchangeability, and patents for this molecule, from the FDA Purple Book.
Built from official FDA Purple Book records (monthly downloads, the Advanced Search interface, and the published Patent List), with reference-product, license-type, and exclusivity context for interferon alfa-2b.
Related FDA reference tools
- FDA Orange BookApproved drugs, generics, therapeutic-equivalence codes, patents, and exclusivity.
- FDA BiosimilarsFDA-approved biosimilars and interchangeable biosimilars, by reference product.
- 510(k) Predicate DatabaseSearch FDA 510(k) clearances and map predicate-device lineage.
- FDA 483 DatabaseFDA Form 483 observations and inspection records by firm, date, and citation.
