Methadone- and heroin-related deaths in Florida.

Methadone is a potent synthetic opioid used for treatment of opioid dependence and chronic pain. Florida Department of Law Enforcement data were analyzed to examine trends in deaths related to or caused by methadone and/or heroin between 2001-2006. Results demonstrated that mortalities associated with methadone use increased steadily as mortalities associated with heroin decreased steadily. Though useful in the treatment of opioid dependence and chronic pain, methadone possesses high abuse potential and documented mortality risks. Treatment with methadone, for both pain and opioid dependence, should be preceded by an abuse liability evaluation. Attempts to minimize diversion should be implemented.