FDA cautions against use of hydroxychloroquine or chloroquine for COVID-19 outside of the hospital setting or a clinical trial due to risk of heart rhythm problems

Does not affect FDA-approved uses for malaria, lupus, and rheumatoid arthritis
So this is dangerous if you use it for treating China Pox but if you have malaria Lupus or arthritis, then you are immune from heart Rythm Problems or any other side effect?
Are the people that are taking it for these other problems all in Hospital.

Mate of Mine had Lupus Very Bad years ago. Knocked him on his arse and put him in IC for a couple of days. Back then they said it was primarily something women got, don't know if they have changed the story in the last 10 years or so. He was NOT in a good way so if they could give this stuff to him the way he was, All I can say you'd want to be pretty far gone with the China Pox for it to be a risk.
He was in the Hospital for a fortnight and it took him months to get back to anything like normal.

I don't think from what I have repeatedly read the China pox is any worse.