Analysis of Methadone-Related Poisoning Cases.

The proportions of poisoning cases caused by methadone alone and methadone combined with other substances or drugs are comparable in China. The majority of deceased caused by methadone poisoning shows typical triad of coma, respiratory depression and miosis, which helps forensic experts determine the cause of death related to methadone. Additionally, it is necessary to increase the routine testing of the concentration of methadone and its combined substances or drugs in deceased, and collect data for the interpretation of the results of related cases.