I posted earlier a warning from the American Heart Association to be very careful in using chloroquine or its derivative hydroxychloroquine if you have a coronary risk factor especially as a PwP.
The Brazilian CT (n-81) was a decent sized trial without a control arm.They used chloroquine plus AZIT, The exact treatment protocol was 450 mgs 2x daily plus AZIT for 5 days in one arm and 650 in the 2nd "high" dose arm plus AZIT. Why they did not use a 3rd arm with hydroxychloroquine I have no idea.
Unfortunately, by day six, 11 patients had died in the high dose arm! In conclusion, they found that "that chloroquine causes a dose-dependent increase in an abnormality in the ECG that could predispose people to sudden cardiac death.” What I have called SDS/CVD. Very similar to findings out of China for employing high doses of chloroquine although some of these studies have been "removed".
Whether the results would have been different with hydroxychloroquine is possible. Nevertheless, if you have a CVD condition and/or use medications to control that condition, use extreme caution with either of these two drugs if you intend to use them.
Sharon