The Changing Landscape for Human Absorption, Metabolism, and Excretion: Practical Experiences From a Data Analysis of 500 Studies.

Coincidental with the intensified regulatory and industry focus on the design and conduct of human absorption, metabolism, and excretion (hAME) studies in the past 12 months, we have recently completed our 500th cohort involving radiolabeled test item administration to humans. Here, we build upon a recent industry white paper in this journal and share some of our own experiences as a Contract Research Organization based upon collaborations with numerous pharma companies and their differing approaches to design and timing, to add further context to the discussion regarding hAME studies and the pivotal role that drug metabolism and pharmacokinetics plays. In this article, we explore how both changing relationships within the industry and shifting regulatory guidelines are impacting strategies, and compare EU and US pre-study approval requirements, before evaluating the trends from over 500 studies conducted at our global facilities conducted over more than 30 years. We conclude with a review of how improved technical capabilities and strategies are influencing the design and conduct of hAME studies, before speculating on some of the driving factors which may shape the direction they take in the future.