Guidelines for Stability Testing of Drugs in Multi-Dose Containers
1) Purpose
The purpose of this SOP is to provide a standardized procedure for conducting stability studies on drugs stored in multi-dose containers. Stability testing ensures that these drugs maintain their safety, efficacy, and quality throughout their shelf life under various storage conditions and repeated use.
2) Scope
This SOP applies to all multi-dose drug containers, including vials, bottles, and prefilled syringes, produced or handled by the organization. It is intended for personnel involved in formulation development, quality control, and regulatory compliance.
3) Responsibilities
Formulation Scientist: Responsible for designing
Quality Control (QC) Team: Responsible for conducting stability tests according to the approved protocol and documenting results.
QA Team: Responsible for reviewing data, ensuring regulatory compliance, and approving the final stability report.
4) 
Procedure
4.1 Study Design:
- Identify stability-indicating parameters (e.g., potency, sterility, particulate matter, and preservative efficacy) relevant to the drug product.
- Select appropriate analytical methods (e.g., HPLC, Sterility Testing, Particulate Matter Analysis) to evaluate these parameters.
- Define storage conditions (e.g., room temperature, refrigerated) based on the product’s characteristics and regulatory guidelines.
- Develop a study protocol outlining the objectives, sampling schedule, and analytical methods to be used, including conditions for repeated use simulation.
4.2 Sample Preparation:
- Prepare samples from representative production batches and label them with batch numbers, storage conditions, and sampling time points.
- Store samples in designated stability chambers under specified conditions.
4.3 Testing Schedule:
- Conduct initial testing on all samples to establish baseline data for the selected parameters.
- Perform follow-up testing at predetermined intervals (e.g., 1 month, 3 months, 6 months) and after simulated use cycles to monitor changes in stability over time.
- Document all test results and analyze data for trends or deviations from acceptance criteria.
4.4 Data Analysis and Reporting:
- Analyze data using statistical methods to determine trends and compliance with acceptance criteria.
- Prepare a stability study report summarizing findings, conclusions, and recommendations for storage and handling conditions.
- Submit the report for QA review and archiving.
5) Abbreviations, if any
QC: Quality Control
QA: Quality Assurance
6) Documents, if any
Multi-Dose Container Stability Protocol: Document detailing the study plan and methodology.
Analytical Data Records: Data sheets for all tests performed.
7) Reference, if any
ICH Q1A(R2): Stability Testing of New Drug Substances and Products
8) SOP Version
Version 1.0