… other drug of abuse, almost doubling between 2007 and 2013-from 161,000 to 289,000-according to the Substance Abuse and … and (8,260). According to National Seizure System data, from 2010 through 2014, heroin seizures in the U.S. rose 81 … on the streets during the course of enforcement, such as a buy-walk, or buy-bust operation. Fentanyl cases in 2014 have …