(LiveScience) Teens who take opioid painkillers without a prescription also often use cannabis, according to a new study.
Researchers analyzed information from more than 11,000 children and teens ages 10 to 18, in 10 U.S. cities. Participants were asked whether they had used prescription opioids in the past 30 days, and whether they had ever used cannabis.
Overall, about 29 percent of the teens said they had used cannabis at some point in their lives. But among the 524 participants who said they had used prescription opioids in the past 30 days, nearly 80 percent had used cannabis.
The findings show that among young opioid users, the prevalence of cannabis use is high, said Vicki Osborne, a doctoral student in epidemiology at the University of Florida. Osborne presented the study Oct. 31 at the meeting of the American Public Health Association in Denver.
Among teens who said they used opioids without a prescription (meaning they obtained the drugs through a friend, family member or other avenue), about 88 percent had used cannabis, compared with 61 percent of those who did have a prescription for the opioids they used.