Small study azithromycin

It was a very small study, but they did seem to find:
Quote
the combination of hydroxychloroquine, a popular anti-malaria drug known under the trade name Plaqenuil, and antibiotic azithromycin (aka Zithromax or Azithrocin) could be especially effective in treating the COVID-19 coronavirus and reducing the duration of the virus in patients.

The anti-malarial by itself was not as effective. Note that the chloroquine treatments are all about shortening the duration of the infection so patients are no longer shedding virus.