Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Trends in lifetime medical and nonmedical use of prescription opioids among high school seniors, 1976–2015. The dotted line reflects the fact that the list of examples of prescription opioids was updated in 2002, which probably contributed to an increase in medical and nonmedical use of prescription opioids in 2002 (see the Measures section for details of the updates).
