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FDA Purple Book · Reference family

burosumab-twza (Crysvita)

burosumab-twza is an FDA-licensed reference biologic from Kyowa Kirin, Inc.. Reference exclusivity, biosimilar lineage, and published patents from official FDA Purple Book records.

0

Biosimilars

0

Interchangeables

0

Listed patents

2018

Reference approved

Reference product

351(a)BLA 761068

Crysvita burosumab-twza

Kyowa Kirin, Inc.

Approved
Apr 17, 2018
Marketing
Rx
Center
CDER
Patents
None listed

Exclusivity & patent cliffs

Approval, exclusivity, and published-patent expiration dates for burosumab-twza, in chronological order.

  1. Reference approval

    Approval date of the reference burosumab-twza product.

    8 yr 3 mo ago

  2. Orphan exclusivity ends

    7-year orphan-drug exclusivity window.

    in 4 mo

Frequently asked questions

Are there biosimilars approved for burosumab-twza (Crysvita)?

No 351(k) biosimilars or interchangeable biosimilars referencing burosumab-twza are listed in the FDA Purple Book yet.

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