Thirty-day prevalence rates of marijuana use for school grades 8, 10, and 12 rose from 8.3 percent in 1991 to 14.6 percent in 2018 after peaking in 1997 at 17.9 percent. High school student marijuana use is generally higher among males than females, with non-Hispanic black youths reporting the highest user rates. Rates of alcohol use among teens have declined drastically since the early 1990's and the average age in which youths first drank alcohol has increased from 13.65 years from 1991 to 1993 to 14.64 years from 2013 to 2015.
Study drugs or smart drugs are prescription stimulants such as Ritalin and Adderall that are generally used to treat Attention Deficit Hyperactivity Disorder (ADHD), but can be used recreationally to increase concentration and boost energy. In 2018, around 40 percent of students in grade 12 thought trying Adderall occasionally posed a great risk for harm, while 4.6 percent had taken Adderall within the last year. While rates of annual Adderall use among adolescents have remained relatively stable over the past few years, rates of Ritalin use have decreased from 4.2 percent in 2001 to less than 1 percent in 2018.
Despite decreases in general drug use among adolescents, the number of drug overdose deaths among those aged 15 to 24 years has grown over the last decade with 5,455 such deaths in 2017. Heroin and prescription opioids are the drugs most commonly involved in overdose deaths. In 2017, there were around 62,862 substance abuse treatment clients under the age of 18 in the U.S. and approximately 26 percent of substance abuse treatment facilities offered specifically tailored programs for adolescents.