Older patients may know how much I have written about Doxycycline [Doxyline] in the past as one of the most “blessed antibiotics” ever discovered in my feelings and that it is highly underused when antibiotics are needed [Of course sometimes/often[?] another antibiotic may be needed.Reason for under-use: cheap!!So you may not be surprised to see here below doxylin mentioned for Corona as a possible option!!Azithromycin  has potentially more side effects and sometimes even dangerous ones in combination with other drugs.
I would love to know if minocycline would fit here as well, especially as it can prevent neurological complications which are well known with corona infections[doxylin can probably do the same]
As Azithromycin and Doxycycline are both commonly used antibiotics that inhibit viral replication and IL-6 production, we may want to consider this general class of antibiotics that functionally inhibits cellular protein synthesis as a side-effect, for the treatment and prevention of COVID-19 disease.https://www.ncbi.nlm.nih.gov/pubmed/32229706