Prof. Tisdale is a Professor of Pharmacy at Purdue University and an Adjunct Professor under the School of Medicine at Indiana University. His main research focus is studying drugs that cause torsades de pointes (TdP) and methods of prevention and reducing the risk of drug-induced TdP. He has published more than 100 journal articles and book chapters, with an emphasis on the topic of drug-induced QT interval prolongation and TdP. He is also a fellow of the American Heart Association, the American College of Clinical Pharmacy, the American Pharmacists Association, and the National Academies of Practice.