Trump is very bad at communicating. However, as I understood what Trump was trying to say is that the drug has already passed clinical tests by the FDA which sh

Trump is very bad at communicating. However, as I understood what Trump was trying to say is that the drug has already passed clinical tests by the FDA which shows it is not massively risky to take, for any reason, within proper limits. So it is FDA approved, just not for COVID-19 uses. (That is, without adding "for COVID-19", the statement "The FDA has approved it to be prescribed" is literally true.) He is contrasting this to some other drug that could potentially be used to help COVID-19 patients but has not had the same testing. This is a huge deal, because it allows the FDA to move quicker in evaluating the potential use of the drug in COVID-19 situations.