Regulatory guidelines comparability testing

The degradation and formation of nonabsorbable drug complexes in the intestinal lumen is the third factor, in addition to dissolution and permeability, which could affect fraction absorption. Limitations of bioavailability due to these factors seem to be less frequent compared with the two other main factors. Regulatory guidelines for BCS-based biowaivers still ask for in vitro studies of luminal degradation in relevant test media, whereas specific binding studies are not required [17]. 

The major difference between application of the ICH S6 guideline in the European Union, compared to the United States and Japan, is the rather more complex interaction with the regulatory agencies in relation to agreeing on the preclinical testing strategy for biopharmaceuticals. While sponsor compa-... 

Cimino, M. C. (2006). Comparative overview of current international strategies and guidelines for genetic toxicology testing for regulatory purposes. Environ Mol Mutagen 47, 362-390. 

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