The ICH M7 Guideline on Assessment and Control of DNA Reactive (Mutagenic) Impurities in Pharmaceuticals to Limit Potential Carcinogenic Risk reached Step 4 of the ICH Process in November 2013 and now enters the implementation period (Step 5).
The purpose of this new ICH Guideline is to offer guidance on analysis of structure activity relationships (SAR) for genotoxicity. Furthermore, it is intended to resolve questions such as whether impurities with similar alerts that potentially have similar mechanism of action should not be combined in calculating a Threshold of Toxicological Concern (TTC) and whether the TTC may differ based on differences in the approved duration of use.
The final Guideline is now available for download under the Multidisciplinary Guideline page.