Assyro AI
US FDAUnited StatesCRLComplete Response Letter

Complete Response Letter NDA 505b1 218317 (May 24, 2024)

Issued May 24, 2024

Issued

May 24, 2024

Application

NDA 505b1 • 218317

Review center

CDER

Stage

Final Decision

Letter type

Complete Response Letter

Response due May 24, 2025Requires resubmission addressing deficiencies.

Summary

This document is a letter from the U.S. Food and Drug Administration (FDA) to an applicant regarding New Drug Application (NDA) 218317. It outlines deficiencies identified during the review process, particularly concerning facility inspections, safety updates, and labeling, and provides instructions for a complete response and resubmission.

Key points

  • The facility must provide satisfactory responses to deficiencies conveyed during pre-approval inspections to the FDA office indicated on form FDA-483 prior to the complete response to the application.
  • The complete response must include the date(s) of the facility’s response to form FDA-483.
  • The complete response must outline the corrections taken in response to the inspection.
  • The applicant must work with the facility in resolving related deficiencies.
  • The proposed proprietary name must be resubmitted when all application deficiencies identified in this letter have been addressed.
  • A safety update must be included as described at 21 CFR 314.50(d)(5)(vi)(b) when responding to the deficiencies.
  • The safety update must describe in detail any significant changes or findings in the safety profile.
  • The safety update must present new safety data from studies/clinical trials for the proposed indication using the same format as in the original submission.

Cited reasons

  • Unresolved Facility Inspection Deficiencies
  • Proprietary Name Resubmission Required
  • Comprehensive Safety Update Requirements
  • The application received a Complete Response Letter due to unresolved deficiencies from pre-approval facility inspections, the need to resubmit the proprietary name, and extensive requirements for a comprehensive safety update, including detailed clinical data, worldwide experience, and case narratives.

Recommended actions

  • The facility must provide satisfactory responses to deficiencies conveyed during pre-approval inspections to the FDA office indicated on form FDA-483 prior to the complete response to the application.
  • The complete response must include the date(s) of the facility’s response to form FDA-483.
  • The complete response must outline the corrections taken in response to the inspection.
  • The applicant must work with the facility in resolving related deficiencies.
  • The proposed proprietary name must be resubmitted when all application deficiencies identified in this letter have been addressed.
  • A safety update must be included as described at 21 CFR 314.50(d)(5)(vi)(b) when responding to the deficiencies.
  • The safety update must describe in detail any significant changes or findings in the safety profile.
  • The safety update must present new safety data from studies/clinical trials for the proposed indication using the same format as in the original submission.

Deficiency summary

The application received a Complete Response Letter due to unresolved deficiencies from pre-approval facility inspections, the need to resubmit the proprietary name, and extensive requirements for a comprehensive safety update, including detailed clinical data, worldwide experience, and case narratives.

Findings

Unresolved Facility Inspection Deficiencies

Severity: major

Following pre-approval inspections of two facilities listed in the application, FDA conveyed deficiencies via Form FDA-483. Satisfactory responses to these deficiencies are required from the facilities prior to the complete response to the application. The resolution of these deficiencies, which may include re-inspection, is critical for approvability.

Recommended response: Collaborate closely with the affected manufacturing facilities to ensure all FDA-483 observations are thoroughly addressed. Provide comprehensive responses to the FDA, including dates of facility responses and detailed corrective and preventive actions taken. Prepare for potential re-inspection.

Proprietary Name Resubmission Required

Severity: minor

The proposed proprietary name was found conditionally acceptable pending approval of the application in the current review cycle. It must be resubmitted as part of the complete response to all identified application deficiencies.

Recommended response: Ensure the proprietary name is included in the resubmission package once all other deficiencies have been fully addressed.

Comprehensive Safety Update Requirements

Severity: major

A detailed safety update is required as described in 21 CFR 314.50(d)(5)(vi)(b). This includes presenting new safety data from clinical trials, tabulations combining new and original data, comparisons of adverse event frequencies, separate tables for other indications, retabulation of premature discontinuations, case report forms and narrative summaries for deaths and serious adverse events, updated exposure information, and a summary of worldwide safety experience.

Recommended response: Perform a thorough review and compilation of all nonclinical and clinical safety data. Generate all required new tabulations, comparisons, and summaries, ensuring compliance with 21 CFR 314.50(d)(5)(vi)(b). Provide all requested case report forms and narrative summaries for relevant events. Include an updated worldwide safety experience summary.

Cited: 21 CFR 314.50(d)(5)(vi)(b)

Regulatory context

Submission stage
final decision
Regulatory pathway
NDA

Impact

Impact score
0.75
Estimated delay
240 days
Estimated rework cost
$0
Subsequent action
resubmission

Strategic insights

The application was not approved primarily due to unresolved manufacturing facility issues, requiring a resubmission of the proprietary name, and significant outstanding requirements for a comprehensive clinical safety data update.

Regulatory change impact: Pending sponsor mitigation plan

Approval likelihood after response: 25%

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