The french study I mentioned previously (below) is the only controled test of chloroquine on COVID-19
I was prescribed it years ago as a preventative malaria treatment. After checking the side-effects, I didn’t take it once. The psychological effects can be severe, and the dosing is critical and individual sensitivity varies greatly. In short, with careful dosing and individual care checking for the first signs of any negative effects, chloroquine likely would be a real help. In the current situation where all healthcare is over-stressed and people are looking for a blanket mass treatment this has the potential to do much more harm than good.
