David's research interests are: biogerontology, liver and ageing, liver sinusoid and ageing and geriatric pharmacology. He has been published over 230 times.
He served on several Australian federal medicines committees: the Pharmaceutical Benefits Advisory Committee (2009-2013) and chaired its Drug Utilisation Subcommittee; and the Australian Drug Evaluation Committee (1998-2005) and chaired its Pharmaceutical Subcommittee.