SOP for Procedure for Assigning New Product Retest Date

SOP for Procedure for Assigning New Product Retest Date

1.0 Objective

To establish a procedure for assigning or extending the retest date of products based on stability data, ensuring product quality, safety, and compliance with regulatory requirements.

2.0 Scope

This SOP is applicable to all finished products manufactured for which retest date assignment or extension is required.

3.0 Responsibility

• Quality Control (QC): Conduct testing and generate analytical data
• Quality Assurance (QA): Review data and approve retest date assignment
• Stability Team: Monitor stability studies and provide reports

4.0 Accountability

• QA Head and Department Head shall be accountable for implementation of this SOP

5.0 Abbreviations and Definitions

• SOP: Standard Operating Procedure
• QA: Quality Assurance
• QC: Quality Control
• Retest Date: The date after which a product/material should be re-examined to ensure it still meets specifications
• Shelf Life: Time period during which a product remains within specifications

6.0 Procedure

6.1 General Requirements

• Retest date shall be assigned based on:
  • Stability study data
  • Analytical testing results
  • Storage conditions
• Retest date assignment must comply with applicable GMP guidelines

6.2 Initial Assignment of Retest Date

• Assign retest date based on:
  • Real-time stability data
  • Accelerated stability data (if real-time data not fully available)
• Follow regulatory/approved stability protocol

6.3 Conditions for Retest Date Extension

Retest date may be extended if:

• Product complies with all specifications during stability testing
• No significant trend or degradation observed
• Storage conditions are maintained as specified
• No major deviation, OOS, or change affecting product quality

6.4 Procedure for Retest Date Extension

1. Sample Selection:
   • Select representative batch/batches nearing retest date
2. Testing:
   • Perform testing as per approved specification
   • Include critical parameters (assay, impurities, dissolution, etc.)
3. Data Review:
   • QC prepares test report
   • Stability data is reviewed for trends
4. Evaluation:
   • Compare results with specifications
   • Ensure results are within limits
5. Decision Making:
   • QA evaluates and recommends extension
   • New retest date shall be scientifically justified
6. Approval:
   • QA Head approval is mandatory
   • Update retest date in records and labels

6.5 Retest Period Assignment Criteria

• Based on:
  • Stability study results
  • Product nature and dosage form
  • Packaging configuration
• Extension period should not exceed justified stability data

6.6 Documentation

• Maintain records of:
  • Stability data
  • Analytical reports
  • Retest date justification
  • Approval signatures
• Update:
  • COA (Certificate of Analysis)
  • Inventory records
  • Labels (if applicable)

6.7 Rejection Criteria

Do not extend retest date if:

• Product fails specifications
• Significant degradation observed
• Out of Specification (OOS) results
• Improper storage conditions

6.8 Precautions

• Follow approved stability protocols
• Ensure data integrity (ALCOA+)
• Avoid arbitrary extension without scientific justification

7.0 Frequency

• As and when retest date is due

8.0 Forms and Records

• Stability Study Report
• Retest Date Extension Form
• Analytical Test Report

9.0 Distribution

• Master Copy: QA
• Controlled Copies: QC, Warehouse

10.0 History