An NPR investigation has found that Fradin-Read's practice is one of more than 30 medical practices and compounding pharmacies across more than a dozen states that have made unproven claims about this drug on their websites and on social media. It remains unclear how many Americans may have taken the drug since the pandemic began, though one doctor told NPR she had prescribed it to more than 100 patients. The cost of the drug can run up to $400 for a month's supply - all out of pocket.