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Emergency department visits related to misuse of prescription or over-the-counter drugs doubled from 500,000 in 2004 to 1 million in 2008, said the report, based on estimates from the Substance Abuse and Mental Health Services Administration's Drug Abuse Warning Network. DAWN generated the estimates by reviewing data and medical charts submitted by 231 U.S. emergency departments.
Illegal drugs such as cocaine and heroin were involved in 1 million ED trips annually, a figure that stayed flat over the time period.