Smears and stupidity aside, how far away are we from developing an inhaled or ingested biopharmaceutical antiseptic, such as Pulmotect, Inc., to combat COVID-19 or pneumonia, etc?

I would be interested to know about current drugs or therapies that involve the lungs or blood producing superoxides, such as those by Pulmotect inc, or whatever the reference was Trump was mentioning. I have not heard any serious discussion of it, but I know it has been used to treat pneumonia. Is such an antiseptic currently available and how effective would it be used for Covid-19?