Rectal ulcer with massive haemorrhage due to activated charcoal treatment in oral organophosphate poisoning.

A 42-year-old woman who had ingested a large amount of fenitrothion emulsion was admitted and treated. Treatments consisted of mechanical ventilation, intravenous administration of atropine and pralidoxime and repeated injection of activated charcoal with magnesium sulphate via a nasogastric tube. The patient developed massive rectal bleeding just after she had passed several hard masses of charcoal on the 10th day. Surgical haemostasis of the rectal ulcer was needed to control the haemorrhage.