Drugs such as hydrocodone, oxycodone, codeine...source: West Texas Newsread moreGrowth in drug spend is hitting a 13-year highIn 2014, the U.S. healthcare system spent $373.9 billion on drugs???13.1 percent more than it did the previous year and the highest rate of spending growth since 2001, according to a new report from IMS Health's Institute for Healthcare Informatics.