Regular cannabis use that starts in adolescence strips away IQ, a NIDA-supported study suggests. Participants who initiated weekly cannabis use before age 18 dropped IQ points in proportion to how long they persisted in using the drug. Persistent cannabis users’ cognitive difficulties were evident to friends and family and measurable on a battery of tests.
Researchers found that 1 in 8 high school seniors had used a prescription opioid nonmedically, and 70 percent of these teens had compounded the attendant risk by co-ingesting an opioid with one or more other drugs. Nonmedical opioid use was significantly more prevalent among whites than among African Americans or Hispanics.
Fewer teens are using cigarettes, alcohol, and most illicit drugs, according to NIDA’s latest Monitoring the Future study. Troubling trends persist in marijuana use, however, and nonmedical prescription drug use remains a concern.
Teens who participated in the intervention Strong African American Families‒Teen at age 16 reported fewer conduct problems and depressive symptoms and less substance abuse at age 17‒18, compared to peers exposed to a control intervention.
NIDA-funded researchers have gathered evidence that brief interventions can help adolescents move away from drug use. In a clinical trial, middle and high school students markedly reduced their substance use following two 60-minute sessions that combined motivational interviewing and cognitive behavioral therapy.
Fewer than 12 percent of adolescents who meet diagnostic criteria for prescription opioid abuse or dependence receive any treatment, according to an analysis of data from the 2005 to 2008 National Survey on Drug Use and Health. The most common reason the adolescents gave for not receiving treatment was their lack of perceived need for it.
Towns that implemented a drug abuse prevention program called Communities That Care will see a return of $5.30 for each $1 they invested during the 5-year trial of the intervention, according to a cost-benefit analysis. The estimate is based on reductions in smoking and delinquency observed during the fourth year of the study among eighth-graders and the projected total costs of smoking, delinquency, and crime avoided over the lifetimes of study participants.
Illicit drug use in the United States in 2010 was at its highest level since 2002, according to the most recent report from the National Survey on Drug Use and Health. A rise in marijuana use drove the increase. A favorable trend of falling cocaine use continued.