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VYLOY — FDA Complete Response Letter (BLA 761365)

Issued to Astellas Pharma US, Inc.. Application reviewed but not approved; deficiencies must be corrected.

Application

BLA • 761365

Product

VYLOY

Company

Astellas Pharma US, Inc.

Review center

Other

Stage

Final Decision

Response due

December 31, 2024

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What did FDA decide for VYLOY?

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

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Source facts

FDA's complete response letter contains source-text evidence related to Facility inspection and CGMP compliance. Theme counts identify where the letter discusses a topic; they do not replace review of the exact redacted letter.

Key details in this letter

  • 1Facility inspection and CGMP compliance: 3 source-text matches.
Facility inspection and CGMP compliance

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 VYLOY complete response letter

What does this complete response letter mean for VYLOY?

Application reviewed but not approved; deficiencies must be corrected. Requires resubmission addressing deficiencies. FDA issued this letter to Astellas Pharma US, Inc. on January 4, 2024.

What is BLA 761365?

BLA 761365 is the application under which FDA issued this complete response letter for VYLOY to Astellas Pharma US, Inc.. It was reviewed by FDA Other. The letter is dated January 4, 2024.

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.