The number of young adults who end up in the emergency room after taking Adderall, Ritalin or other such stimulants has quadrupled in recent years with fresh evidence of the unexpected consequences that can result from the wide use of medicines for conditions like attention deficit disorder. http://www.nytimes.com/2013/08/09/health/sharp-rise-among-young-in-emergency-care-after-stimulant-use.html?ref=us   The number of emergency room visits related to stimulants among people ages 18 to 34 increased to 23,000 in 2011, from 5,600 in 2005, according to national data from the Substance Abuse and Mental Health Services Administration. The rise was particularly pronounced among 18- to 25-year-olds and is part of a broader pattern of negative health effects from prescription drug abuse across American society.