Assyro AI
US FDAUnited StatesALApproval Letter

Approval Letter Other 210136 (Jan 1, 2024)

Issued January 1, 2024

Issued

January 1, 2024

Application

Other • 210136

Review center

Other

Stage

Final Decision

Letter type

Approval Letter

Response due December 31, 2024Product may be marketed.

Summary

This is a Complete Response letter from the FDA to Braeburn Inc. for their New Drug Application (NDA) 210136 for BRIXADI (buprenorphine) extended-release injection. The FDA has determined that the application cannot be approved in its present form due to deficiencies related to facility inspections, prescribing information, proprietary name resubmission, safety update requirements, and mandated postmarketing studies.

Key points

  • Satisfactorily resolve deficiencies identified during facility inspections of Pharmaceutics International manufacturing, testing, and warehouse facilities.
  • Submit draft labeling responsive to the electronic communication dated December 15, 2021.
  • Use the SRPI checklist to correct any formatting errors in the labeling to ensure conformance with regulations and guidances.
  • Submit updated content of labeling (21 CFR 314.50(l)(1)(i)) in structured product labeling (SPL) format.
  • Provide a highlighted or marked-up copy showing all changes and a clean Word version of the labeling, with annotations supporting proposed changes.
  • Ensure the proposed Prescribing Information (PI) conforms to content and format regulations at 21 CFR 201.56(a) and (d) and 201.57.
  • Resubmit the proposed proprietary name, BRIXADI, when responding to the application deficiencies.
  • Include a safety update as described at 21 CFR 314.50(d)(5)(vi)(b) when responding to deficiencies, detailing significant changes, presenting new and combined safety data, retabulating reasons for premature trial discontinuation, providing case report forms and narrative summaries for deaths/serious adverse events, describing changes in common adverse events, providing updated exposure information, summarizing worldwide safety experience, and providing English translations of current approved foreign labeling.

Cited reasons

  • Unsatisfactory Resolution of Facility Inspection Deficiencies
  • Inadequate Prescribing Information and Formatting
  • Resubmission of Proprietary Name Required
  • Comprehensive Safety Update Required
  • Postmarketing Study Requirements Identified
  • The application cannot be approved in its present form due to unresolved manufacturing facility deficiencies, inadequate prescribing information requiring updates and formatting corrections, the need to resubmit the proprietary name, and the requirement for a comprehensive safety update. Postmarketing study requirements were also outlined.

Recommended actions

  • Satisfactorily resolve deficiencies identified during facility inspections of Pharmaceutics International manufacturing, testing, and warehouse facilities.
  • Submit draft labeling responsive to the electronic communication dated December 15, 2021.
  • Use the SRPI checklist to correct any formatting errors in the labeling to ensure conformance with regulations and guidances.
  • Submit updated content of labeling (21 CFR 314.50(l)(1)(i)) in structured product labeling (SPL) format.
  • Provide a highlighted or marked-up copy showing all changes and a clean Word version of the labeling, with annotations supporting proposed changes.
  • Ensure the proposed Prescribing Information (PI) conforms to content and format regulations at 21 CFR 201.56(a) and (d) and 201.57.
  • Resubmit the proposed proprietary name, BRIXADI, when responding to the application deficiencies.
  • Include a safety update as described at 21 CFR 314.50(d)(5)(vi)(b) when responding to deficiencies, detailing significant changes, presenting new and combined safety data, retabulating reasons for premature trial discontinuation, providing case report forms and narrative summaries for deaths/serious adverse events, describing changes in common adverse events, providing updated exposure information, summarizing worldwide safety experience, and providing English translations of current approved foreign labeling.

Deficiency summary

The application cannot be approved in its present form due to unresolved manufacturing facility deficiencies, inadequate prescribing information requiring updates and formatting corrections, the need to resubmit the proprietary name, and the requirement for a comprehensive safety update. Postmarketing study requirements were also outlined.

Findings

Unsatisfactory Resolution of Facility Inspection Deficiencies

Severity: critical

During recent inspections of Pharmaceutics International manufacturing and testing facilities (FEI 3006503102 and FEI 1000513101), field investigators conveyed deficiencies. Satisfactory resolution of these deficiencies is required before this application may be approved.

Recommended response: Address all deficiencies identified during the facility inspections at Pharmaceutics International (FEI 3006503102 and FEI 1000513101) to ensure satisfactory resolution and compliance with GMP.

Inadequate Prescribing Information and Formatting

Severity: major

Submit draft labeling responsive to the electronic communication dated December 15, 2021. Correct formatting errors using the SRPI checklist to ensure conformance with regulations and guidances. Submit updated content of labeling in structured product labeling (SPL) format as described at FDA.gov, conforming to 21 CFR 314.50(l)(1)(i), 21 CFR 201.56(a) and (d), and 201.57. Provide a highlighted/marked-up copy and a clean Word version.

Recommended response: Revise prescribing information to address all agency comments, ensure compliance with formatting regulations (21 CFR 201.56, 201.57), and submit in SPL format (21 CFR 314.50(l)(1)(i)) with marked-up and clean versions.

Cited: 21 CFR 314.50(l)(1)(i), 21 CFR 201.56(a), 21 CFR 201.56(d), 21 CFR 201.57

Resubmission of Proprietary Name Required

Severity: minor

The proposed proprietary name, BRIXADI, was found acceptable pending approval of the application in the current review cycle. Resubmit the proposed proprietary name when responding to the application deficiencies.

Recommended response: Resubmit the proprietary name BRIXADI as part of the complete response to the application deficiencies.

Comprehensive Safety Update Required

Severity: major

Include a safety update as described at 21 CFR 314.50(d)(5)(vi)(b) when responding to deficiencies. This update must detail significant changes or findings in the safety profile, present new safety data from studies, provide tabulations of new and combined data, include tables comparing frequencies of adverse events, provide separate tables for other indications, retabulate reasons for premature trial discontinuation, provide case report forms and narrative summaries for deaths/serious adverse events, describe changes in incidence of common AEs, provide updated exposure information, summarize worldwide experience, and include English translations of current approved foreign labeling.

Recommended response: Provide a comprehensive safety update in accordance with 21 CFR 314.50(d)(5)(vi)(b), incorporating all new nonclinical and clinical safety data, detailed analyses, and worldwide experience.

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

Postmarketing Study Requirements Identified

Severity: info

If approved, postmarketing studies will be required under section 505(o)(3) of the FDCA to assess known serious risks (precipitated withdrawal) and unexpected risks (systemic histopathological changes, reproductive/developmental effects, or cancer due to elemental impurities or leachables). Specifically, two postmarketing clinical trials are required to explore safe accelerated dose-initiation regimens for weekly and monthly BRIXADI, with prespecified case definitions for precipitated withdrawal/lack of tolerability and dose inadequacy.

Recommended response: Prepare protocols for the two specified postmarketing clinical trials addressing precipitated withdrawal and dose initiation, and consider potential risks from elemental impurities/leachables as part of future development.

Cited: section 505(o)(3) of the FDCA

Regulatory context

Submission stage
final decision
Regulatory pathway
505(b)(2) of the Federal Food, Drug, and Cosmetic Act

Impact

Impact score
0.95
Estimated delay
545 days
Estimated rework cost
$0
Subsequent action
resubmission

Strategic insights

The application received a Complete Response due to critical manufacturing site deficiencies, significant labeling issues requiring comprehensive updates and formatting, and the need for a thorough safety data update. The agency also outlined specific postmarketing study requirements for approval.

Regulatory change impact: Pending sponsor mitigation plan

Approval likelihood after response: 5%

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