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TYENNE — FDA Complete Response Letter (BLA 761275)

Issued to Fresenius Kabi USA, LLC. Application reviewed but not approved; deficiencies must be corrected.

Application

BLA • 761275

Product

TYENNE

Company

Fresenius Kabi USA, LLC

Review center

Other

Stage

Final Decision

Response due

December 31, 2024

Assyro regulatory brief

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What did FDA decide for TYENNE?

Source facts and Assyro context are separated so you can scan the action quickly without treating analysis as an FDA conclusion.

Verify in source

Source facts

FDA's complete response letter contains source-text evidence related to Labeling, packaging, and proprietary name. Theme counts identify where the letter discusses a topic; they do not replace review of the exact redacted letter.

Key details in this letter

  • 1Labeling, packaging, and proprietary name: 17 source-text matches.
Labeling, packaging, and proprietary name

Suggested next step

Review the exact redacted FDA letter and address each stated deficiency before resubmission.

Open the document workspace

Built from structured FDA metadata and deterministic source-text signals. Topic matches are navigation aids, not legal or regulatory conclusions. Verify material decisions against the original FDA document.

FDAPDFUpdated Jul 30, 2026

FDA source document

Read the full FDA complete response letter (PDF)

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Common questions about the TYENNE complete response letter

What does this complete response letter mean for TYENNE?

Application reviewed but not approved; deficiencies must be corrected. Requires resubmission addressing deficiencies. FDA issued this letter to Fresenius Kabi USA, LLC on May 31, 2023.

What is BLA 761275?

BLA 761275 is the application under which FDA issued this complete response letter for TYENNE to Fresenius Kabi USA, LLC. It was reviewed by FDA Other. The letter is dated May 31, 2023.

What happens after an FDA complete response letter?

FDA will not approve the application in its present form. The sponsor can resubmit after addressing every deficiency listed in the letter — which starts a Class 1 (two-month) or Class 2 (six-month) resubmission review clock — withdraw the application, or request an opportunity for a hearing.