Okay, it’s a legitimate question, but only for academic purposes.
Your question has no legitimacy in the discussion of whether to use this medication to treat coronavirus.
Potential benefit is saving the patient’s life. Potential risk is diarrhea and nausea.
Potential benefits outweigh potential risks.
Risk of not taking it is rapid death from respiratory distress.
No. If the proportions of those taking it chronically are the same as the incidence of the diseases they were taking it for among the seriously ill and dead that is at least an indication it does nothing to reduce mortality.