Photostability can impact shelf life, handling, and packaging of the product. This testing is an important part of the drug development process. ... These tests can be repeated iteratively until they demonstrate that the drug is adequately protected from light.

What is photostability?

: resistant to change under the influence of radiant energy and especially of light.

What is photostability testing?

ACTIVE SUBSTANCE

For substances, photostability testing should consist of two parts: forced degradation testing and confirmatory testing. The purpose of forced degradation testing studies is to evaluate the overall photosensitivity of the material for method development purposes and/or degradation pathway elucidation.