Doxepin and nordoxepin concentrations in body fluids and tissues in doxepin associated deaths

Abstract: Body fluids and tissues in eight doxepin (Dox)-related deaths were investigated in order to prove whether the individual concentration of Dox, the concentration sum of parent drug and its active metabolite N-desmethyldoxepin (NDox) or the concentration ratio Dox/Ndox valuably contribute to making a cause of death determination. Individual case histories were shortly described. Dox and NDox concentrations were determined by LC–MS/MS. Dox concentration measured from two cases was well within a concentration range considered therapeutic, whereas subtherapeutic dosing may have occurred in another two cases. There were two cases of fatal Dox ingestion, as well as a case of high dosage and advanced putrefaction, respectively. The liver concentration sum may be more useful if a fatal ...

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