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Interaction of alcohol and drugs in fatal poisonings

Laboratory of Toxicology; Department of Forensic Medicine, FIN-00014, University of Helsinki, PO Box 40, Finland anna.koski{at}iki.fi

Ilkka Ojanperä

Erkki Vuori

Laboratory of Toxicology, Department of Forensic Medicine, FIN-00014, University of Helsinki, Finland

In Finnish data from 1995 / 2000, 1006 fatal poisonings due to alcohol (ethanol), a single drug or both were statistically analysed in retrospect to evaluate the interaction between alcohol and drugs. In 53% of these cases, low concentrations of some common benzodiazepines were present. The median postmortem blood alcohol concentration (BAC) was 3.3 (w/w) in the 615 alcohol poisonings, but significantly lower, ranging from 1.3 to 1.7, when promazine, doxepin, amitriptyline or propoxyphene were found together with alcohol. When levomepromazine, temazepam or zopiclone were present, the median BAC was also significantly lower, 2.5 trations of a drug (excluding citalopram), suggesting a positive concentration ^/ effect relationship. Fatal toxicity indices (FTIs) were calculated by relating the number of deaths caused by a drug to the corresponding sales figures. Promazine had an extremely high FTI, followed by levomepromazine, propoxyphene, doxepin and amitriptyline. The other drugs had relatively low FTIs. The results reflect not only the acute toxicity of a given drug / alcohol combination but also the manners of use and abuse of these drugs.

Key Words: drug • ethanol • fatal intoxication • interaction • poisoning • postmortem

Human & Experimental Toxicology, Vol. 22, No. 5, 281-287 (2003)
DOI: 10.1191/0960327103ht324oa


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				A Koski, E Vuori, and I Ojanpera Relation of postmortem blood alcohol and drug concentrations in fatal poisonings involving amitriptyline, propoxyphene and promazine Human and Experimental Toxicology, August 1, 2005; 24(8): 389 - 396. [Abstract] [PDF]