Adolescents using multiple sources for prescription drugs at high risk for substance use disorders

Roughly 11% of high school seniors reported prescription drug misuse during the past year, and of those, 44% used multiple supply sources, according to a pair of University of Michigan studies.

More than 70% of adolescents who obtained prescription drugs from multiple sources had a substance use disorder-;involving prescription medications, other drugs and alcohol-;within the previous year.

The national average for a substance use disorder for all adolescents is 5%, said senior author Sean Esteban McCabe, a professor at the U-M School of Nursing.

Both studies, published in the July issue of the Journal of the American Academy of Child and Adolescent Psychiatry, found that adolescents using multiple sources for prescription medications were at high risk for other substance use and substance use disorders, among other disturbing patterns.

One study identified sources of misuse for three classes of prescription drugs-;opioids, stimulants and tranquilizers-;and the differences in motives and behavior among 18,549 high school seniors. The other study identified sources of controlled medications and related behaviors in 103,920 adolescents ages 12 to 17.

A "very concerning" finding is that 30% of prescription drug misusers took their own leftover medication, with girls more likely to take leftovers than boys, said McCabe, who is also co-director of the U-M Center for the Study of Drugs, Alcohol, Smoking and Health. Boys were more likely to obtain prescription drugs from friends or purchase them.

The most common sources for prescription drugs for 12-to-17-year-olds were getting them free from friends and relatives, physician prescriptions for opioids, and buying stimulants and tranquilizers illegally.

These adolescents are most in need of intervention to address their substance use and any other medical and mental health issues."

Ty Schepis, associate professor, Texas State University, lead author of one of the studies

This is the first known research to look at adolescent misuse of leftover medications across these three prescription drug classes, McCabe said.

"The implications from these two studies could not be clearer," McCabe said. "Parents, public health experts and clinicians must rally to address this problem. There is a critical need for clinical workforce training to support clinic and school-based education, screening, prevention and early intervention."

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