A fatality due to ingestion of the antidepressant drug moclobemide is
reported. Moclobemide is a selective and reversible inhibitor of monoa
mine oxidase type A. Previous reports have suggested that it is a safe
drug even when taken in large quantities. The few reported fatalities
have all been ascribed to serotonin syndrome, due to an interaction b
etween moclobemide and other serotonergic agents. A 48-year-old woman
with a history of depression and suicide attempts was found deceased a
t home. Autopsy revealed no evidence of significant natural disease or
injury. Toxicologic analysis was performed and drug levels measured b
y capillary gas chromatography. The blood concentration of moclobemide
was 137 mg/L and the liver concentration was 432 mg/kg. Low levels of
diazepam, nordiazepam, and trifluoperazine were also detected. Death
was considered to be due to acute poisoning by moclobemide. This case
report is the first, to our knowledge, where death has been attributed
to the toxic effects of moclobemide done.