The availability of a growing body of real-world evidence has regulators considering how clinical trials using disparate sources of data might work. Many see harnessing such information as a way to provide better insight into the safety and efficacy of drugs while reducing the cost of clinical trials. A number of issues, though, will need to be addresses as the U.S. Food and Drug Administration takes a first pass at a framework for using real-world evidence. We spoke Nancy Dreyer, chief scientific officer & senior vice president of real-world & analytic solutions for IQVIA, about real-world data, its potential to change the way clinical trials are conducted, and the challenges to applying it.