U.S. regulators have revoked emergency authorization for malaria drugs promoted by President Donald Trump for treating COVID-19 amid growing evidence they don’t work and could cause serious side effects.

Several authors of a large study that raised safety concerns about malaria drugs for coronavirus patients have retracted the report, saying independent reviewers were not able to verify information that’s been widely questioned by other scientists.

When President Donald Trump doesn’t like the message, he shoots the messenger. A look at recent rhetoric and reality as the pandemic’s death toll approached 100,000 in the U.S.

President Donald Trump told reporters Monday he has been taking hydroxychloroquine and a zinc supplement daily “for about a week and a half now.” The drug not been shown to combat the new coronavirus.

Gov. J.B. Pritkzer says he recognizes that hydroxychloroquine “is being overused without a lot of testing to back it up,” but he will not interfere with doctors prescribing the drug.

A drug that has the potential to heal, or even prevent, the coronavirus is in high demand. And that’s a problem for patients with autoimmune diseases who know the drug works for them.