Dextromoramide, propoxyphene and its main metabolite, norpropoxyphene, were determined in blood after solid-liquid extraction by means of an HPLC method using photodiode-array detection. Two cases of fatal overdose resulting from abuse of the two drugs are presented. In case 1 the necropsic whole blood contained dextromoramide at toxic level (194 ng ml-1) and propoxyphene (614 ng ml-1) and norpropoxyphene (1100 ng ml-1) within the therapeutic range; the death could be due to the combined effect of the two analgesics and, perhaps, other associated drugs. In case 2, the necropsic whole blood concentrations of propoxyphene and norpropoxyphene were 4330 and 3800 ng ml-1, respectively, and could be considered as lethal.
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