It is a message we need to take notice of: the US Drug Abuse Warning Network, which monitors drug-related morbidity and mortality, has recently reported a 57% increase in emergency room admissions involving stimulant medications between 2005 and 2010. One-half of the visits were related to non-medical use of stimulants for those aged 18 and over, the highest incidence being in the 18–25 age group. There was no significant increase in the non-medical use of stimulants for those aged under 18. Marijuana was the most common drug combined with stimulants for 15–17-year-olds, and alcohol for 18–25-year-olds.