I had found a few historical references too, dating back to 1600's as "Cinchona Bark", "Jesuits Bark" & "Jesuits Powder"....

An intersting history of #Quinine #Chloroquine #Hydroxychloroquine

I started here;
"The Nine Lives of Hydroxychloroquine"
http://rheumnow.com/blog/nine-lives-hydroxychloroquine https://twitter.com/Sageremarks/status/1254271181743587332
This article, from the British Medical Journal, states the history goes back to 17th century, brought to Spain by Cardinal Juan De Lugo.

"350 Years of the Peruvian Fever Bark"
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2546010/
I searched "Cardinal Juan De Lugo Jesuits powder" https://www.google.com/search?client=firefox-b-1-m&q=cardinal+juan+de+lugo+jesuits+powder&oq=cardinal+juan+de+lugo+jesuits+powder&aqs=heirloom-srp
Take a few mins to do some of your own research, but this is what I found;

A book titled;
Taking the Medicine: A Short History of Medicines Beautiful Idea, and Our Difficulty Swallowing It
By Druin Burch
Some struggles are timeless...
#Hydroxychloroquine
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