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A worker inspects chloroquine tablets. Photo: Feature China/Barcroft Media via Getty Images

"A man has died and his wife is under critical care after the couple, both in their 60s, ingested chloroquine phosphate, an additive commonly used at aquariums to clean fish tanks," which is also part of one of the antimalaria drugs that President Trump has mentioned in recent days, according to Banner Health, the hospital system that treated both patients.

Why it matters: People who attempt to self-medicate risk serious side effects or death, and it's why any messaging about chloroquine and the related hydroxychloroquine should emphasize that these drugs have not been approved to prevent or treat the new coronavirus.

Worth noting: The malaria drug comes in tablet form, but the type the couple used was a toxic substance — not medication.

  • The man's wife told NBC News: "I had it in the house because I used to have koi fish."

Go deeper: Trump touts drugs not yet approved by FDA for treating coronavirus

Editor's note: The story and headline have been corrected to reflect the fact that the form of chloroquine the couple ingested was used in aquariums (not the medication).

Go deeper

In photos: Tokyo Olympics day 9 highlights

Team USA's Ryan Murphy, Zach Apple, Michael Andrew and Caeleb Dressel celebrate winning gold in the final of the men's 4x100m medley relay swimming event during the Tokyo 2020 Olympic Games at the Tokyo Aquatics Centre in Tokyo on Aug. 1. Photo: Odd Andersen/AFP via Getty Images

Day nine of the Tokyo Olympic Games Sunday saw the final day of swimming competition end with a historic win for Team USA.

The big picture: The U.S. men's 4x100-meter medley relay team set a new record world as they won the final and Caeleb Dressel earned a fifth gold — becoming the fifth American to do so. Team USA's Bobby Finke won the 1,500-meter freestyle.

Trump PACs raise over $82M for first half of 2021

Former President Trump during the Conservative Political Action Conference in Dallas, Texas, on July 11. Photo: Brandon Bell/Getty Images

Former President Trump's political action committees (PACs) raised more than $82 million in the first half of 2021, per Federal Election Commission filings published on Saturday.

Why it matters: It's a significant amount for a former president who's been banned from major social media platforms. It demonstrates his ability to raise huge sums of money should he choose to run for the presidency for a third time.

Updated 6 hours ago - Sports

Olympics dashboard

Team USA's Caeleb Dressel celebrates winning gold in the final of the men's 50m freestyle swimming event at the Tokyo 2020 Olympic Gameson Sunday. Photo: Odd Andersen/AFP via Getty Images

🚨: Simone Biles won't compete in Olympic floor finals, individual vault or uneven bars

🏊: U.S. wins gold in men's 4x100-meter medley relay, earning Caeleb Dressel fifth gold — American Bobby Finke wins gold in men's 1,500-meter freestyle

🏊‍♀️: Katie Ledecky wins gold in women's 800m freestyle

🏌️‍♂️: Golfer Xander Schauffele wins gold for U.S. by one shot

🇬🇧: Britain wins gold in new BMX freestyle category and gold in first-ever Olympic mixed 4x100m medley relay

📷: In photos: Tokyo Olympics day 9 highlights

🏳️‍⚧️: Axios at the Olympics: Games grapple with trans athletesTrans athletes see the Tokyo Games as a watershed moment

Go deeper: Full Axios coverage