That's because the Trump cult, in their infinite wisdom, were taking ivermectin intended for animals.
October 21, 2021 -- It's a drug that's been supported by some conservative media figures, but taking ivermectin to treat or prevent COVID-19 might land you in the hospital.
Interest in the drug surged last summer as the highly contagious Delta variant took over the United States. But instead of protecting against the virus, the use of a medicine typically reserved for horses and cattle has instead prompted a spike in calls to poison control centers across the country.
Researchers said dangerous side effects from taking ivermectin can include confusion, loss of control over body movement ("ataxia"), weakness, low blood pressure, seizures, gastrointestinal distress, dizziness, vision symptoms or rash. The side effects can be triggered by taking too much of the drug or having it interact with other medications, they noted.
"It's very easy to give yourself too much. Most people who develop symptoms probably took too much, but we did have several people who were taking it for days and weeks and then developed toxicity."
"The only indication for prescribing ivermectin is to treat a parasitic intestinal infection known as strongyloidiasis [roundworm]. It also may be used for onchocerciasis [river blindness] or as a topical treatment for pediculosis [lice] and rosacea.
They had medical trials to prove it's effectiveness for the above.
That's how they got FDA approval for treating those illnesses in humans.
"The FDA generally cannot ban particular uses of human drugs once they are otherwise approved".
They didn't ban it, just strongly discouraged it use for treating covid.