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 701 mg±464 mg. ECG showed a prolonged QTc interval (equal to or greater than 0.50 s) in 30% of patients. The lowest observed dose for prolonged QTc was 625 mg. This series includes two cases of seizures occurring around two hours after ingestion of 900 and 2 250 mg of indoramin. A review of the literature showed cardiac disorders, with a delayed mechanism of action up until 18 hours after ingestion. Therefore, rapid medical resuscitation and prolonged cardiac monitoring for at least 24 hours after ingestion of 625 mg are recommended.