Being 70 years old and widely prescribed does not mean the function and associated risks of the drug are well-understood. I literally saw a physician mention to

Being 70 years old and widely prescribed does not mean the function and associated risks of the drug are well-understood. I literally saw a physician mention today in a video ( https://www.youtube.com/watch?v=ILowf7Tw7QY https://www.youtube.com/watch?v=ILowf7Tw7QY ) that the exact mechanisms at work here are not fully understood. He explained a half dozen different things HCQ/CQ might be doing in this scenario that are all biologically plausible based on what we believe we know. HCQ/CQ aren't unique in this either. Lithium is widely used as a psychiatric treatment and has been in use for a long time even though for most of that time period we haven't had a good detailed understanding of how exactly it works. Gaps in understanding like that can lead to disaster unless we apply enough caution to match. Another way to put this: We know some things the drug does, but that doesn't mean we know the complete set of what it does. We know some of the side effects and some of the risks, but unless we have a complete end-to-end understanding of everything happening here there is always going to be a risk worth considering.