Abstract
Serum concentrations of the benzodiazepine drugs were measured by the HPLC method in acute intoxicated cases between January and December 1993. Analysis was made on a total of 45 cases and 45 kinds of the drugs with 103 substances were demonstrated. The HPLC could detect 64 substances related to 20 kinds of the benzodiazepine drugs, but no major tranquilizer or antideperessant drugs were detected.