Different fatal toxicity of neuroleptics identified by autopsy
Abstract
Autopsies and toxicological analyses at the Institute of Forensic Medicine revealed 85 fatal intoxications with neuroleptics in Vienna from 1991 to 1997. A total of 17 cases were linked to a single neuroleptic (NL) alone, while 68 deaths were attributed to a combination of NLs with other drugs. The most frequently detected agent was prothipendyl (n=41). During the study period the number of defined daily doses of high-potency NLs prescribed increased significantly (P< or =0.001) due to increased prescribing of new atypical antipsychotics. The quantity of intermediate- and low-potency NLs dispensed remained stable. The most frequently prescribed NL was haloperidol. The relative toxicities of different NLs were calculated by dividing the number of deaths caused by this NL into the number of defined daily doses prescribed in the observation period (f-value). Single-substance intoxications and multiple-substance intoxications were distinguished. The highest f-values were associated with low-potency NLs, especially with prothipendyl, chlorprothixene and levomepromazine. Low f-values were found for the group of high-potency NLs, including flupentixol, fluphenazine, haloperidol and pimozide, as well as olanzapine. Compared to the f-va...Continue Reading
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