A stable toxin easily made from the mash that remains after processing Castor beans. At one time, it was used as an oral laxative, castor oil, causes diarrhea, nausea, vomiting, abdominal cramps, internal bleeding, liver and kidney failure, and circulatory failure. There is no antidote. During World War II, Britain developed, but never used, a ricin bomb. In the past, ricin was linked to Al Qaeda and to Iraq. Seven men from north Africa were arrested in Great Britain after it was discovered in a raid.