Came across this article today on CNN... be careful. It’s not proven to be a treatment yet.
Arizona man dies after self-medicating with chloroquine to treat coronavirus
Well, it's something that doctors say shows promise—not a panacea. Of course, that doesn't mean you should pump yourself with this medicine without a doctor's supervision. The article doesn't say where the couple got the drug, how much they took, etc. In fact, it tells you very little.
Besides, in general, the same medicine isn't always effective for everyone. I'm sorry to hear about this man, but that doesn't mean that this drug cannot be useful in helping to treat Covid-19 when administered properly.
In fact, the World Health Organization is running a megatrial on the four most promising therapies, and this medicine is one of them: