Procedure for Stability Testing of Drugs with Narrow Therapeutic Index

1) Purpose

The purpose of this SOP is to define the procedure for conducting stability studies for drugs with a narrow therapeutic index in compliance with US FDA guidelines. This ensures that these drugs maintain their safety, efficacy, and quality throughout their shelf life.

2) Scope

This SOP applies to all personnel involved in the stability testing of drugs with a narrow therapeutic index, including formulation development, quality control, and regulatory affairs teams.

3) Responsibilities

Formulation Development Team: Responsible for developing the drug formulation.
Stability Study Team: Responsible for conducting stability studies according to FDA guidelines.
Quality Assurance Team: Responsible for ensuring data integrity and compliance with regulatory requirements.

4) Procedure

4.1 Protocol Development

4.1.1 Develop a stability testing protocol that includes parameters such as assay, dissolution, and degradation products.

4.1.2 Define storage conditions

(e.g., long-term, accelerated) as per FDA 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 for defined intervals.

4.3 Conducting Stability Tests

4.3.1 Perform stability tests at all required intervals.

4.3.2 Document all data and ensure compliance with the approved protocol.

4.4 Data Analysis and Reporting

4.4.1