Illicit Use of Prescription Drugs
"Nationwide, 20.7% of students had taken prescription drugs (e.g., Oxycontin, Percocet, Vicodin, codeine, Adderall, Ritalin, or Xanax) without a doctor’s prescription one or more times during their life (i.e., ever took prescription drugs without a doctor’s prescription)"
"Youth Risk Behavior Surveillance — United States, 2011," Morbidity and Mortality Weekly Report (Atlanta, GA: Centers for Disease Control, June 8, 2012) Vol. 61, No. 4, p. 23.