I don't think this is what happens in regular doses.
So it appears that the way they use it for COVID-19 is in lethally high quantities.
You swap one risk for another.
Worth trialling drugs, especially if employed in high doses, prior to distributing them en masse. They, like coronavirus, could not care less if the gut the speculative information emerges from belongs to a president of the USA.
Hydrochloroquine sounds increasingly like the new Benghazi, Pizzagate, Seth Rich, trickle-down economics, Uranium One etc. Lack of evidence is the normal method. Revisiting old failures never happens. So the Bananarepublican Party keeps creating new evidence-free theories, relying on the naivete of its rubes as early adopters.
The doctor I originally cited suggested tests prior to adoption of chloroquines. I was fine with that. But the medical process requires tests to prove efficacy, not gut instinct.
Not sure the rubes will ever learn. Sad.