A critical assessment of the ICH guideline on photostability testing of new drug substances and products (Q1B): Recommendation for revision

Journal of Pharmaceutical Sciences
Steven W BaertschiHanne H Tønnesen

Abstract

The ICH guideline on photostability (ICH Topic Q1B) was published in November 1996 and has been implemented in all three regions (US, EU, and Japan). The guideline describes a useful basic protocol for testing of new drug substances and associated drug products for manufacturing, storage, and distribution, but it does not cover the photostability of drugs under conditions of patient use. The pharmaceutical industry now has considerable experience in designing and carrying out photostability studies within the context of this guideline, and issues have been identified that would benefit from the revision process. The purpose of this commentary is to accomplish the following: (i) highlight issues proposed for consideration in the ICH revision process, (ii) offer a rationale for why these issues may compromise the design of a testing protocol and/or the results of the testing program, and (iii) provide recommendations for clarification of the guideline.

References

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