[MrEdd]

Seventy year old medical books even.
The military was using it by the end of the forties.

We were still using it when I was in.

It can have pretty potent side effects and a lot of people got a fever or chills from it.

[Mrs. Don-o]

I think high dosages will give you the poopin' miseries. Not so with smaller dose.

I took hydroxychloroquine (Plaquenil) for years for my rheumatoid arthritis: one 200 mg tablet twice a day, every day, with food. Never had the slightest uncomfortable side effect.

Don't know what the dosage would be for CV19 though.