WOONSOCKET, R.I., 2017-Mar-17 — /EPR Retail News/ — CVS Health (NYSE: CVS) today (March 15, 2017) announced that, in 2016, its pharmacy benefit management (PBM) clients achieved the lowest drug trend in the past four years, despite rising drug prices. CVS Caremark clients saw their prescription drug trend drop to an average of 3.2 percent compared…