The prominence of high drug prices among current American grievances derives from three recent episodes. In 2014 Gilead Sciences brought out Sovaldi, a drug that cures hepatitis C within twelve weeks but costs $1,000 a pill, making the price of a full course of treatment $84,000. In 2015 Turing Pharmaceuticals, a new company headed by Martin Shkreli, a hedge-fund manager, acquired Daraprim, the sole treatment available in the United States for a life-threatening parasitic infection, and raised the price per tablet from $13.50 to $750. And in 2016 Mylan Pharmaceuticals, which had a stranglehold on the market for EpiPens (used to counter allergic shock), began selling them wholesale for $284 apiece, a 600 percent increase over the wholesale price in 2007, and offering them only in packages of two.