Ricin is a popular choice for attempting to poison politicians


Two suspicious packages were discovered at a Pentagon mail facility Monday, the Associated Press reports. Then, this evening, the Secret Service announced that another envelope addressed to President Donald Trump was intercepted before it got inside the White House. There’s no word yet about what might have been tainting the president’s mail — but an unnamed federal official said that early tests detected ricin in the Pentagon packages, NBC Washington reports.

It might not be ricin — after all, it takes a day or two for the FBI to fully run its tests. But ricin is an oddly popular choice for attempting to poison presidents. A man from Mississippi and a woman from Texas, for example, were sentenced to prison for mailing ricin-filled letters to President Obama, among others. President George W. Bush apparently got his own ricin letter, too.

Ricin’s popular in part because it’s easy to find. The toxin is in castor beans, which grow on a shrub that’s common in parts of the US. “It’s one of the few poisons that’s actually found in significant quantities in nature,” Peter Chai, a medical toxicologist at Brigham and Women’s Hospital in Boston, tells The Verge in an email.

It’s unusual for people to poison themselves by eating the beans because it requires some serious chewing, and it’s not easily absorbed through the gut, Chai says. The more nefarious way to get at the poison is to isolate it from the mush that’s left behind after pressing the beans for castor oil, which can be used as a laxative.

The poison works by essentially gumming up the protein building machinery in cells, according to a 2005 review published in JAMA. That typically harms cells that are dividing quickly, first, Chai says. And it leads to a whole slew of problems like nausea, puking, bleeding, swelling, plummeting blood pressure, and organ failure, a 2003 paper published in Toxicological Reviews says.

The specific symptoms depend on how a person was exposed to the ricin, and how big a dose they got, according to the CDC. Inhaling it can cause breathing problems, fluid build up in the lungs, low blood pressure, and death. Eating it can cause vomiting, bloody diarrhea, seizures, organ failure, and, rarely, death, the CDC says. Injecting it can cause weakness, muscle aches, vomiting, fevers, organ failure, and death. (It sounds far fetched, but ricin injections have happened: BBC journalist and Bulgarian dissident Georgi Markov was murdered by stabbing with a ricin-tipped umbrella.)

“Ricin is one of the most toxic biological agents known,” according to the CDC. Death can occur anywhere from a day and a half to three days after exposure. And inhaling it (or injecting it) are the more dangerous ways to deliver ricin, Chai says: “Since the toxin is directly absorbed, death is much more likely in those cases.” That could be why assassins like to send it by mail: purified ricin can be made into a powder that goes airborne when the recipient opens an envelope.

The really scary thing about ricin is that there’s no antidote, according to the CDC — although there has been work on developing a vaccine. That means the best way to deal with ricin poisoning is to avoid being poisoned in the first place. If someone is exposed, treatment is usually aimed at keeping the patient’s symptoms under control. That means making sure they can breathe, keeping them hydrated, and giving them drugs to prevent seizures and boost their blood pressure.

Ricin isn’t the only poison lawmakers receive, of course. Anthrax is another infamous white powder that was mailed to people in the media as well as senators in 2001. But there is one less frightening option: the white powder hoax. It may, relievingly, turn out that this is simply much ado about baking soda.