What is azithromycin?

Azithromycin is a widely used antibiotic sold as Zithromax or Zmax. Azithromycin belongs to the class of drugs known as “macrolide antibiotics,” which work by killing bacteria or preventing their growth. It is administered as an injection, an oral liquid or a tablet. It is popular in its “Z-Pak” form, which is a five-dose treatment rather than the standard 10 doses that most antibiotics require.