A Nobel Prize and a horse dewormer: Explaining the controversy over ivermectin and COVID-19

To prevent or treat COVID-19, would you consider using a drug labeled "for oral use in horses only"? 

How about one whose creation, for human beings, won a Nobel Prize?

Both drugs are ivermectin. 

So perhaps it’s no wonder that debate continues to swirl about whether ivermectin, for the coronavirus, is only for crackpots or has its place in the fight against the pandemic. 

Even as prescriptions for ivermectin have risen 24-fold since before the pandemic, and some people have resorted to pressuring hospitals to use it on COVID-19 patients,...