Yan He
Sanofi Aventis Group, USA
Title: Amorphous solid dispersions: Utilization and challenges in drug discovery and development
Biography
Biography: Yan He
Abstract
Amorphous solid dispersion (ASD) can accelerate a project by improving dissolution rate and solubility, offering dose escalation flexibility and excipient acceptance for toxicology studies, as well as providing adequate preclinical and clinical exposure. The prerequisite physicochemical properties for a compound to form a stable ASD are glass forming ability and low crystallization tendency, which can be assessed using computational tools and experimental methods. The experimental polymer excipient screening techniques are discussed. Improved technologies for polymer screening with minimal quantity of drug substance, and the scalability of ASD from bench to commercial are reviewed. Considerations of in vitro evaluations, preclinical animal selection, and the translation of the preclinical results to clinical studies are also discussed. Better understanding of how polymers improve the stability of the amorphous phase in the solid state and how ASD improves bioavailability have facilitated the applications of ASD ranging from discovery research to preclinical development and further to commercialization. With the understanding of how ASDs are currently used in the pharmaceutical industry and what challenges remain to be solved, ASD can be applied to solve drug formulation problems at given research and development stages.