A quinine based drug similar to chlroquine was used a thousand times on ME whenever I was sick with flu or malaria in India, when I was a kid. And now I will be 80 next month and still kicking azz. It is very effective and left no bad long lasting effects on me. But it is very bitter to taste.
My oldest son’s Rheumatologist prescribed Plaquenil (hydroxychloroquine) twice a day several years ago for his Rheumatoid arthritis. He’s been taking it all along with Humira injections, without any side effects. I have no idea what the dosage is.