There is a popular narrative about the opioid epidemic now killing more than 30,000 Americans a year: People are put on prescription painkillers, maybe after they have an accident or a surgery, and then they get hooked. Sometimes they move on to heroin.
Read more here: https://www.vox.com/policy-and-politics/2017/10/5/16432418/voxcare-rise-of-heroin-one-chart