It would be essentially a clinical trial, an open-label one. There even have been several blinded trials, that were discontinued mid-way, because the drugs bei

It would be essentially a clinical trial, an open-label one. There even have been several blinded trials, that were discontinued mid-way, because the drugs being tested were so effective. To continue giving placebo and denying obvious cure would be unethical, and so the trial was stopped, placebo arm cancelled - and everyone got the actual medicine.