People are looking at many potential therapies for Wuflu, as they should. However, the chance that any particular existing drug will be effective against coronavirus is not very high.
I know one approach for which success is actually likely ( > 50% chance of success) : serum therapies, also known as passive antibody therapy. that approach has worked on a very wide spectrum of infectious diseases, such as pneumococcal pneumonia, group A streptococci, hepatitis B, measles, RSV, and Ebola (far from a complete list). It’s being tried right now, with encouraging results.