Purple Book product · Reference 351(a)
Avonex
interferon beta-1a
May 17, 1996
Approved
Reference 351(a)
License type
Disc
Marketing
None
Listed patents
Sourced from the FDA Purple Book · verified Jul 02, 2026
Key dates
Approval
Approval date of this BLA submission.
May 17, 1996
30 yr 7 mo ago
Orphan exclusivity ends
7-year orphan-drug exclusivity window.
May 17, 2003
23 yr 6 mo ago
Today
Pharmaceutical detail
Strength
30MCG
Dosage form
For Injection
Route
Intramuscular
Presentation
Single-Dose Vial
Center
CDER
License number
1697
Product number
001
Submission type
Original
Supplement number
Not listed
Change type
Not listed
Reference product family
View full familyThis is the reference (originator) product. No biosimilars or interchangeables reference it in the Purple Book yet.
2 additional BLA records for this product (other strengths or presentations) are in the same reference family.
Patent list
No patent-list records were published for this product. The Purple Book patent list reflects the statutory patent exchange under the BPCIA and is not exhaustive.
Source provenance
- advanced-searchAdvanced Search · Jul 02, 2026
- monthly-downloadMonthly download · Jul 02, 2026
Change history
- v3Jul 02, 2026
- v2Jul 02, 2026
Frequently asked questions
Does Avonex have approved biosimilars?
No 351(k) biosimilars or interchangeable biosimilars referencing Avonex are listed in the FDA Purple Book yet.
What is Avonex's BLA number?
Avonex is licensed under BLA 103628, held by Biogen Inc..
When was Avonex approved by the FDA?
Avonex was approved by the FDA on May 17, 1996.
Related FDA reference tools
- FDA Orange BookApproved drugs, generics, therapeutic-equivalence codes, patents, and exclusivity.
- FDA BiosimilarsThe list of FDA-approved biosimilars and interchangeable biosimilars, by reference product.
- 510(k) Predicate DatabaseSearch FDA 510(k) clearances and map predicate-device lineage.
- FDA 483 & Inspection DatabaseFDA Form 483 observations and inspection records by firm, date, and citation.
