Bottles of Purdue Pharma L.P. OxyContin medication sit on a pharmacy shelf in Provo, Utah, U.S., on Wednesday, Aug. 31, 2016. A Nov. 2015 forecast from health data firm IMS Health expects global sales of brand and generic prescription drugs, and nonprescription medicines, to total $1.4 trillion in 2020. Photographer: George Frey/Bloomberg via Getty Images
