The Stability Testing Process: From ICH Conditions to Shelf-Life Assurance

Pharmaceutical and bio-tech products must be put through rigorous stability testing before release in the public sector. During the testing process, the product and packaging, are subjected to varying temperature and humidity depending on where they are planned to be released in the world.

For different stability zones, different ICH conditions are required to ensure the products are being tested in the right environment so are ready more sale in that region. For example, in zones 1 and 2, the ICH conditions used would be 25°C/60%rh, which would be a long-term study climate.

During the testing phase, compliance with Good Manufacturing Practices (GMP) is essential, particularly as outlined in frameworks such as the EU GMP guidelines and the PIC/S GMP Guide (Chapter 6.26). These standards require the implementation of ongoing stability programmes that extend well beyond initial product approval and continue throughout the product’s entire lifecycle.

During the testing process, samples are withdrawn at predefined intervals. This is dependent on the testing taking place, as per the ICH guidelines, based on the stability zone they are testing for the product will be tested at different times during the testing cycle. These are often referred to as stability time points and assessed to confirm that both the product and its packaging continue to perform as originally specified. This includes evaluating critical quality attributes such as potency, purity, physical integrity, and, where applicable, microbiological stability. Packaging is also scrutinised to ensure it maintains its protective function, safeguarding the product from environmental factors such as moisture, light, and oxygen.

These ongoing checks serve a vital purpose: they provide real-time assurance that the product remains safe, effective, and compliant with regulatory specifications under its labelled storage conditions throughout its shelf life.

At LTE, we deliver advanced environmental room solutions engineered to support precise, consistent, and fully compliant stability testing. Designed with the stringent demands of the pharmaceutical and biotechnology sectors in mind, our systems provide tightly controlled temperature and humidity conditions that align with global regulatory expectations.

Whether supporting product development, ongoing stability studies, or regulatory submissions, LTE provides dependable, high-performance environments that help ensure product quality and compliance at every stage of the lifecycle.