Guidelines for Stability Testing of Drugs in Pre-Filled Syringes

1) Purpose

The purpose of this SOP is to outline the procedures for conducting stability studies on drugs stored in pre-filled syringes. Stability studies ensure that drugs maintain their safety, potency, and quality throughout their shelf life, considering the unique packaging and delivery system of pre-filled syringes.

2) Scope

This SOP applies to all drugs formulated and packaged in pre-filled syringes by the organization, including biologics, vaccines, and parenteral medications. It is intended for use by personnel involved in formulation development, quality control, and regulatory affairs.

3) Responsibilities

Formulation Scientist: Responsible for designing the stability study protocol.

Quality Control (QC) Team: Responsible for conducting the required tests and documenting results.

QA Team: Responsible for reviewing data, ensuring compliance, and approving the final report.

4) Procedure

4.1 Study Design:

1. Select appropriate stability-indicating parameters, such as appearance, extractables and leachables, sterility, and potency.
2. Define
   

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   the storage conditions (e.g., temperature, humidity) to be tested based on the drug’s intended use and regulatory guidelines.
3. Develop a study protocol that includes the sampling schedule, analytical methods, and acceptance criteria.

4.2 Sample Preparation:

1. Prepare samples from representative batches of the drug filled in syringes according to standard procedures.
2. Label samples with relevant information, including