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FDA-regulated product — FDA Complete Response Letter

Issued to CellTrans Inc.. Application reviewed but not approved; deficiencies must be corrected.

Product

FDA-regulated product

Company

CellTrans Inc.

Stage

Final Decision

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What did FDA decide for FDA-regulated product?

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 Chemistry, manufacturing, and controls, Labeling, packaging, and proprietary name, Clinical efficacy and substantial evidence. Theme counts identify where the letter discusses a topic; they do not replace review of the exact redacted letter.

Key details in this letter

  • 1Chemistry, manufacturing, and controls: 7 source-text matches.
  • 2Labeling, packaging, and proprietary name: 3 source-text matches.
  • 3Clinical efficacy and substantial evidence: 1 source-text match.
Chemistry, manufacturing, and controlsLabeling, packaging, and proprietary nameClinical efficacy and substantial evidence

Suggested next step

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

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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 FDA-regulated product complete response letter

What does this complete response letter mean for FDA-regulated product?

Application reviewed but not approved; deficiencies must be corrected. Requires resubmission addressing deficiencies. FDA issued this letter to CellTrans Inc. on August 18, 2021.

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.