How to Assess Temperature Excursions
A temperature excursion occurs when material experiences conditions outside its approved range.
Collect facts
Document:
- material and batch
- required condition
- actual temperatures
- duration
- packaging
- location
- product configuration
- previous excursions
- logger accuracy
Compare with stability data
Use product-specific stability data whenever possible. Generic assumptions should not replace direct evidence.
Consider cumulative exposure
Repeated short excursions may matter even when each event alone appears minor.
Analytical testing
Testing may support disposition but should be targeted to likely degradation pathways.
Frequently asked questions
Can appearance justify release?
No. Many degradation pathways are invisible.
Is one excursion always disqualifying?
No. Scientific assessment may support continued use.
Can accelerated stability data be used?
They may inform assessment when scientifically relevant.
Who should approve disposition?
Qualified personnel under the applicable quality system.
Key takeaways
Excursion decisions should be evidence-based, documented, and tied to actual stability behavior rather than intuition.
References
- ICH Q1A(R2). Stability Testing of New Drug Substances and Products.
- ICH Q1B. Photostability Testing of New Drug Substances and Products.
TSMS Labs educational disclaimer: For laboratory research and educational purposes only. Not for human consumption. This content is not medical, clinical, or regulatory advice.