I noticed that Dr. Zev Zevlenko's Hydroxychloroquine regimen calls for one 200mg HCQ twice a day (400 mg total),plus the Z-pack and zinc. I think that's also the typical dosage Plaquenil that rheumatoid arthritis patients take.
I have R.A. and it's what I took every day for 15 years. And by the way, I had by blood and urine drawn quarterly to monitor my levels, and my eyes checked annually to screen for retinopathy, and never had the least problem. I'm not on it anymore, but I still have my last few pills sitting on the counter.
I can't imagine it would do much harm for a course of just 5 days, which is what Dr. Zev is doing.
So yeah, it's a good idea. Check those R.A. and Lupus people, and see if the Plaquenil has protected them from COVID-19.
Lots of flu epidemics over the past 15 years.
Did you ever get it?
Other virus based diseases?