This book takes an international perspective, examining the issue of substandard and falsified medical products cross nationally. Falsified and poor-quality medicines are prevalent in low- and middle-income countries, but this book also includes research from high-income countries arguing that they too have vulnerabilities, and emphasising the need for vigilance even in well-resourced and well-regulated regimes. Medicine Across Borders: Exploration of Grey Zones provides an interdisciplinary space for a depth and diversity of material that spotlights some contemporary themes hindering access to essential medicines and driving the penetration of substandard and falsified medical products. The authors are drawn from a range of academic disciplines across the social and medical sciences presenting findings from data collected using an eclectic mix of methods and analysis. Surveys, ethnography, narrative case studies, statistical, and thematic analysis are all deployed.