Procedure for Stability Testing of Polymorphic Drug Substances

1) Purpose

The purpose of this SOP is to define a procedure for conducting stability testing for polymorphic drug substances in compliance with relevant regulatory guidelines. This ensures that polymorphic substances maintain their intended form, quality, safety, and efficacy throughout their shelf life.

2) Scope

This SOP applies to all personnel involved in the stability testing of polymorphic drug substances, including formulation development, quality control, and regulatory affairs teams.

3) Responsibilities

Formulation Development Team: Responsible for developing formulations containing polymorphic drug substances and selecting suitable packaging materials.
Stability Study Team: Responsible for conducting stability studies according to approved protocols.
Regulatory Affairs Team: Responsible for ensuring compliance with regulatory requirements and submitting stability data to the relevant authorities.

4) Procedure

4.1 Protocol Development

4.1.1 Develop a stability testing protocol that includes parameters specific to polymorphic drug substances, such as

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4.1.2 Define storage conditions (e.g., temperature, humidity) and testing intervals based on regulatory guidelines.

4.2 Sample Preparation and Storage

4.2.1 Prepare samples in their final packaging for stability testing.

4.2.2 Store samples under specified conditions (e.g., controlled room temperature, refrigerated) as per the protocol.

4.3 Conducting Stability Tests

4.3.1 Perform stability tests at