OK, slow down. What FDA actually said was "do not use ivermectin intended for animals on humans": https://www.fda.gov/animal-veterinary/product-safety-informati

OK, slow down. What FDA actually said was "do not use ivermectin intended for animals on humans": https://www.fda.gov/animal-veterinary/product-safety-information/fda-letter-stakeholders-do-not-use-ivermectin-intended-animals-treatment-covid-19-humans https://www.fda.gov/animal-veterinary/product-safety-informa... Physicians can and do use drugs off-label at their discretion all the time; the FDA is not charged with regulating that. (They do, however, regulate the advertising of a drug with claims which are unsupported by clinical trials.)