Assyro AI
US FDAUnited StatesALApproval Letter

Approval Letter Other 761085 (Jan 1, 2019)

Issued January 1, 2019

Issued

January 1, 2019

Application

Other • 761085

Review center

Other

Stage

Final Decision

Letter type

Approval Letter

Product may be marketed.

Summary

This document is a Complete Response letter from the FDA to Evolus, Inc. regarding their Biologics License Application (BLA) 761085 for botulinum toxin Type A injection. The FDA has determined that the application cannot be approved in its present form due to various product quality, prescribing information, proprietary name, and safety update deficiencies. The letter outlines specific issues and provides recommendations for addressing them to facilitate a successful resubmission.

Key points

  • Provide a list of all unsolicited information and changes added to the BLA after the initial receipt on May 15, 2017.
  • Evaluate the effect of hold time on endotoxin detection by spiking a known amount of standard endotoxin into undiluted Drug Product (DP) and test for recoverable endotoxin over time, then submit the report in the BLA resubmission.
  • Implement routine bioburden monitoring for the drug product.
  • Provide a description of the bioburden test method, method qualification, summary data, and the qualification report.
  • Revise reference material qualification procedures to ensure sufficient quantities of reference material are generated to support all necessary testing, including qualification of future reference materials.
  • Revise the Drug Substance (DS) reference material qualification and requalification protocol to include adequate stability monitoring of the reference materials.
  • Revise the annual stability protocol to include testing at 3, 6, 9, and 18 months as recommended by ICH Q5C guidelines.
  • If the distributor is responsible for performing release operations for Evolus, they must be listed as a manufacturer in the license application per 21 CFR 600.3 (t), (u), and (aa).

Cited reasons

  • Unsolicited Information and Changes During Review
  • Insufficient Bioburden Monitoring
  • Inadequate Drug Substance Reference Material Management
  • Insufficient Stability Data for Reduced Testing Program
  • Distributor Role and Manufacturer Definition
  • Prescribing Information and Labeling Deficiencies
  • Proprietary Name Resubmission Required
  • Comprehensive Safety Update Required

Recommended actions

  • Provide a list of all unsolicited information and changes added to the BLA after the initial receipt on May 15, 2017.
  • Evaluate the effect of hold time on endotoxin detection by spiking a known amount of standard endotoxin into undiluted Drug Product (DP) and test for recoverable endotoxin over time, then submit the report in the BLA resubmission.
  • Implement routine bioburden monitoring for the drug product.
  • Provide a description of the bioburden test method, method qualification, summary data, and the qualification report.
  • Revise reference material qualification procedures to ensure sufficient quantities of reference material are generated to support all necessary testing, including qualification of future reference materials.
  • Revise the Drug Substance (DS) reference material qualification and requalification protocol to include adequate stability monitoring of the reference materials.
  • Revise the annual stability protocol to include testing at 3, 6, 9, and 18 months as recommended by ICH Q5C guidelines.
  • If the distributor is responsible for performing release operations for Evolus, they must be listed as a manufacturer in the license application per 21 CFR 600.3 (t), (u), and (aa).

Deficiency summary

The Biologics License Application (BLA) for botulinum toxin Type A injection cannot be approved in its present form due to significant product quality issues, including the submission of unsolicited information and changes during the review cycle, inadequate bioburden monitoring, insufficient reference material management, and unsupported reductions in stability testing. Additionally, there are concerns regarding the definition and listing of a distributor as a manufacturer, and the need for comprehensive labeling updates and a thorough safety update.

Findings

Unsolicited Information and Changes During Review

Severity: major

Unsolicited information and changes were submitted during the BLA review cycle, including process validation data from new drug product (DP) lots and changes to the DP post-approval stability protocol. The extent of these changes has not been fully determined, impacting the assessment of approvability. A comprehensive list of all unsolicited information and changes added to the BLA after the initial receipt on May 15, 2017, is required.

Recommended response: Provide a comprehensive list of all unsolicited changes and their rationale. Ensure all future submissions adhere to established amendment procedures and clearly document all modifications.

Insufficient Bioburden Monitoring

Severity: major

Routine bioburden monitoring was not performed to verify continued microbial control of the drug product. Implementation of routine bioburden monitoring is required, along with a description of the test method, method qualification, summary data, and the qualification report.

Recommended response: Implement a robust routine bioburden monitoring program for the drug product. Provide a detailed description of the test method, full method qualification, summary data, and the qualification report.

Inadequate Drug Substance Reference Material Management

Severity: major

The drug substance (DS) reference material management program does not generate sufficient quantities of a given reference material lot to support all required testing. Procedures need revision to ensure adequate quantities for all necessary testing, including qualification of future reference materials. Additionally, the DS reference material qualification and requalification protocol must include adequate stability monitoring of the reference materials.

Recommended response: Revise reference material qualification procedures to ensure sufficient quantities are generated for all required testing. Update qualification and requalification protocols to include adequate stability monitoring of reference materials.

Insufficient Stability Data for Reduced Testing Program

Severity: major

The applicant removed testing points (3, 6, 9, and 18 months) from the post-approval stability protocol without providing sufficient stability data to support such a reduced program. The updated annual post-approval stability protocol is inadequate to ensure that potential changes to commercial DP during storage are detected in a timely manner. Revision to include these testing points, as recommended by ICH Q5C guidelines, is required.

Recommended response: Revert to a comprehensive stability testing protocol including all standard time points (3, 6, 9, 18 months) or provide robust data to justify any reduction, aligning with ICH Q5C guidelines.

Distributor Role and Manufacturer Definition

Severity: major

The applicant's response indicated that a 'soon to be established distributor' would be responsible for certain release operations (visual inspection, verification of COAs, quantity, temperature maintenance) and that the applicant would rely on the distributor’s SOPs and QA. The agency states that if the distributor performs release operations, they fit the definition of a manufacturer per 21 CFR 600.3 (t), (u), and (aa) and should be listed as such in the license application.

Recommended response: Clarify the roles and responsibilities of the distributor. If the distributor performs manufacturing functions, ensure they are properly listed as a manufacturer in the BLA and comply with all associated regulatory requirements.

Cited: 21 CFR 600.3 (t), 21 CFR 600.3 (u), 21 CFR 600.3 (aa)

Prescribing Information and Labeling Deficiencies

Severity: major

The agency reserves comment on the proposed labeling until the application is otherwise adequate. The applicant is encouraged to review PLR Requirements, Pregnancy and Lactation Labeling Final Rule, and the SRPI checklist. An updated content of labeling in Structured Product Labeling (SPL) format, as per 21 CFR 601.14(b), is required.

Recommended response: Revise labeling to comply with PLR requirements, Pregnancy and Lactation Labeling Final Rule, and SRPI checklist. Submit updated content in SPL format.

Cited: 21 CFR 601.14(b)

Proprietary Name Resubmission Required

Severity: minor

The proposed proprietary name, Jeuveau, was found acceptable pending approval of the application in the current review cycle. The applicant must resubmit the proposed proprietary name when responding to the application deficiencies.

Recommended response: Resubmit the proposed proprietary name with the complete response to the application deficiencies.

Comprehensive Safety Update Required

Severity: critical

A comprehensive safety update is required, including data from all nonclinical and clinical studies/trials, detailed description of significant changes, retabulation of adverse events (new data combined with original, comparison tables), reasons for premature discontinuation, case report forms/narratives for deaths/serious AEs, changes in common AEs, updated exposure information, worldwide safety experience, and English translations of foreign labeling.

Recommended response: Conduct a thorough safety update as specified, providing all requested data, analyses, and documentation from all relevant studies and worldwide experience.

Regulatory context

Submission stage
final decision
Regulatory pathway
BLA 351(a)

Impact

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

Strategic insights

The application received a Complete Response due to significant product quality and manufacturing control issues, including data integrity concerns related to unsolicited changes and inadequate stability data. Furthermore, regulatory compliance regarding the definition of a manufacturer and comprehensive updates to labeling and safety information are critical outstanding items.

Regulatory change impact: Pending sponsor mitigation plan

Approval likelihood after response: 5%

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