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Authors report a retrospective study of all cases of indoramin-only poisoning notified to the Paris poison Centre from 1986 to 2010. Fifty five cases of indoramin self-poisoning were included: 40 adults and 15 children. The mean supposed ingested dose was about 701mg±464mg. ECG showed a prolonged QTc interval (equal to or greater than 0.50s) in 30% of patients. The lowest observed dose for prolonged QTc was 625mg. This series includes two cases of seizures occurring around two hours after ingestion of 900 and 2 250mg of indoramin. A review of the literature showed cardiac disorders, with a delayed mechanism of action up until 18hours after ingestion. Therefore, rapid medical resuscitation and prolonged cardiac monitoring for at least 24hours after ingestion of 625mg are recommended.