Evaluation of Methadone Consumption Rate Based on Post-mortem Toxicology Examinations in Cases of Drug-related Deaths in Iran: 2015-2017

Background: Given the increasing prevalence of methadone overdose and the growing number of deaths in Iran, the present study was conducted to determine the mortality rate of methadone detected in the cadavers brought to the Forensic Medicine Organization between 2015 and 2017. Methods: This cross-sectional study was performed on 7,486 cases of substance abuse deaths registered in the Forensic Medicine Organization during 2015-2017. In order to investigate the drug abuse, samples collected from the cadavers were initially examined for their drug contents, such as methadone, by standard screening methods and then confirmed by Thin Layer Chromatography (TLC). Using two checklists, the information collected about each cadaver consisted of the identity, autopsy and laboratory data. After data collection, they were entered into the Stata software version 14 MP. Results: The cadavers’ mean age was 36.6±12.6 years. Over the 3-year duration of the study, the standardized mortality rate increased from 35 to 39 cases per million per year. Of these cases, 6066 were randomly assigned to toxicology, 50.1% had used methadone one month before their death. Approximately 75% of the methadone abusers had taken another drug simultaneously, mostly morphine or methamphetamine. Conclusion: Considering the relatively high prevalence of methadone detected post-mortem, monitoring for methadone entry into public market and identifying the death-related factors in the drug abusers are considered as significant measures to improve upon the current alarming situation in the Iranian society