The market for Orphan drugs is growing at more than twice the rate of other prescription medicines In 2013, a record 260 therapeutics won orphan designations in the United States alone as science, policy, and pricing are fueling the trend for drugmakers to develop expensive drugs for small patient populations. We spoke to Jon Gardner, author of a new report from EvaluatePharma, about the growth of the orphan drug market, how successful drugmakers have been at expanding the use of these drugs for non-orphan indications, and whether growing pricing pressure will lead to disruptions in the market for these products.