It's a chemosensitizer, I'd say it is. https://en.wikipedia.org/wiki/Chemosensitizer https://en.wikipedia.org/wiki/Chemosensitizer edit: It's still being rese

It's a chemosensitizer, I'd say it is. https://en.wikipedia.org/wiki/Chemosensitizer https://en.wikipedia.org/wiki/Chemosensitizer edit: It's still being researched, but it is an anti-cancer drug, just like how chemo drugs get classed. https://www.thelancet.com/journals/lanonc/article/PIIS1470-2045(06)70875-0/fulltext https://www.thelancet.com/journals/lanonc/article/PIIS1470-2... Chemo drugs aren't really a technical category, but it seems like chloroquine will become part of the anti-cancer family soon. Given our recent discovery that chemotherapy has only gives you a 2% greater chance of survival (again, your immune system fights of cancer just like it fights off viruses), I'm not so hopeful here. https://www.thelancet.com/journals/lanonc/article/PIIS1470-2045(16)30383-7/fulltext https://www.thelancet.com/journals/lanonc/article/PIIS1470-2... (summary: chemotherapy actively kills people, some people would have survived without it)