Assyro AI
US FDAUnited StatesALApproval Letter

Approval Letter Other 215320 (Jan 1, 2024)

Issued January 1, 2024

Issued

January 1, 2024

Application

Other • 215320

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 AFT Pharmaceuticals Ltd. regarding their New Drug Application (NDA) 215320 for Combogesic (acetaminophen/ibuprofen) solution for injection. The FDA has determined that the application cannot be approved in its present form due to several deficiencies related to nonclinical data (toxicological risk assessment for leachables), prescribing information, carton and container labeling, medication guide, proprietary name, and the need for a safety update.

Key points

  • Submit a revised toxicological risk assessment for all leachable compounds detected above the 5 mcg/day threshold.
  • Submit documentation confirming the structural identification and quantification of leachable compounds using validated methods.
  • Base the leachable risk assessment on the maximum level of each leachable expected in the drug product from long-term stability samples.
  • Provide justification for all safety factors employed if using a Permissible Daily Exposure (PDE) assessment as described in ICH Q3C.
  • Submit original study reports for published literature used to support safety assessments, accompanied by a detailed comparison to modern toxicology study endpoints and justification for adequacy.
  • Provide adequate data and scientific bridging to support safety justifications based on analogous compounds, including understanding of absorption, distribution, metabolism, and elimination.
  • Submit draft prescribing information (PI) that is responsive to a separate communication, using the SRPI checklist to correct formatting errors.
  • Submit updated content of labeling in structured product labeling (SPL) format as described at FDA.gov.

Cited reasons

  • Inadequate Toxicological Risk Assessments for Leachables
  • Deficiencies in Prescribing Information Content and Format
  • Deficiencies in Carton and Container Labeling
  • Missing Medication Guide Statement on Labeling
  • Proprietary Name Requires Resubmission
  • Comprehensive Safety Update Required Upon Resubmission
  • The application cannot be approved in its present form due to inadequate toxicological risk assessments for leachables, issues with draft prescribing information and carton/container labeling, and requirements for a comprehensive safety update upon resubmission.

Recommended actions

  • Submit a revised toxicological risk assessment for all leachable compounds detected above the 5 mcg/day threshold.
  • Submit documentation confirming the structural identification and quantification of leachable compounds using validated methods.
  • Base the leachable risk assessment on the maximum level of each leachable expected in the drug product from long-term stability samples.
  • Provide justification for all safety factors employed if using a Permissible Daily Exposure (PDE) assessment as described in ICH Q3C.
  • Submit original study reports for published literature used to support safety assessments, accompanied by a detailed comparison to modern toxicology study endpoints and justification for adequacy.
  • Provide adequate data and scientific bridging to support safety justifications based on analogous compounds, including understanding of absorption, distribution, metabolism, and elimination.
  • Submit draft prescribing information (PI) that is responsive to a separate communication, using the SRPI checklist to correct formatting errors.
  • Submit updated content of labeling in structured product labeling (SPL) format as described at FDA.gov.

Deficiency summary

The application cannot be approved in its present form due to inadequate toxicological risk assessments for leachables, issues with draft prescribing information and carton/container labeling, and requirements for a comprehensive safety update upon resubmission.

Findings

Inadequate Toxicological Risk Assessments for Leachables

Severity: major

The sponsor has not provided adequate toxicological risk assessments for leachables over the 5 mcg/day qualification threshold. The original approach utilizing ICH M7 for genotoxicity is not acceptable for general toxicity. Additionally, compounds were only tentatively identified, and method validation is ongoing, which is not acceptable for safety assessment.

Recommended response: Submit a revised toxicological risk assessment for all leachable compounds detected above the 5 mcg/day threshold. Ensure structural identification and quantification are confirmed using validated methods. The risk assessment should be based on the maximum level of each leachable from long-term stability data. Justify all safety factors if employing a Permissible Daily Exposure (PDE) assessment as described in ICH Q3C. Provide detailed study designs for any published literature used and compare to modern toxicology endpoints. Justify safety assessments based on analogous compounds with adequate data.

Deficiencies in Prescribing Information Content and Format

Severity: major

Draft labeling will be provided in a separate communication. Upon resubmission, submit draft labeling that is responsive to that communication. Correct any 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. Provide a highlighted or marked-up copy showing all changes, as well as a clean Word version, with annotations supporting proposed changes. The proposed Prescribing Information (PI) must conform to the content and format regulations found at 21 CFR 201.56(a) and (d) and 201.57.

Recommended response: Upon resubmission, submit draft labeling responsive to the separate communication. Use the SRPI checklist to correct formatting errors and ensure conformance with regulations and guidances. Submit updated content of labeling in SPL format. Provide highlighted/marked-up and clean Word versions with annotations. Ensure PI conforms to 21 CFR 201.56(a) and (d) and 201.57.

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

Deficiencies in Carton and Container Labeling

Severity: major

Draft carton and container labeling will be provided in a separate communication. Upon resubmission, submit draft carton and container labeling that is responsive to that communication.

Recommended response: Upon resubmission, submit draft carton and container labeling responsive to the separate communication.

Missing Medication Guide Statement on Labeling

Severity: minor

Add the bolded statement 'ATTENTION PHARMACIST: Each patient is required to receive the enclosed Medication Guide' or an appropriate alternative to the carton and container labeling per 21 CFR 208.24(d).

Recommended response: Add the required Medication Guide statement to the carton and container labeling as specified in 21 CFR 208.24(d).

Cited: 21 CFR 208.24(d)

Proprietary Name Requires Resubmission

Severity: info

The proposed proprietary name, Combogesic IV, was found acceptable pending approval of the application in the current review cycle. It must be resubmitted when responding to the application deficiencies.

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

Comprehensive Safety Update Required Upon Resubmission

Severity: major

Upon resubmission, include a safety update as described at 21 CFR 314.50(d)(5)(vi)(b). This includes data from all nonclinical and clinical studies, detailed changes in safety profile, new safety data presentation, combined tabulations, comparison tables, separate tables for other indications, retabulation of premature trial discontinuations, case reports for deaths/serious adverse events, information on common adverse events, updated exposure information, worldwide experience summary, and English translations of foreign labeling.

Recommended response: Prepare a comprehensive safety update upon resubmission, adhering to all requirements outlined in 21 CFR 314.50(d)(5)(vi)(b), including data from all studies, detailed safety profile changes, new data presentation, combined tabulations, comparison tables, separate tables for other indications, retabulation of premature trial discontinuations, case reports for deaths/SAEs, information on common AEs, updated exposure, worldwide experience, and foreign labeling translations.

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

Regulatory context

Submission stage
final decision
Regulatory pathway
505(b)(2)

Impact

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

Strategic insights

The application was not approved primarily due to significant deficiencies in the nonclinical toxicological assessment of leachables, requiring validated methods and comprehensive risk assessments. Additionally, there are multiple labeling issues (prescribing information, carton/container, medication guide) and a need for a thorough safety update upon resubmission.

Regulatory change impact: Pending sponsor mitigation plan

Approval likelihood after response: 25%

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