are doxycycline and azithromycin related?
Azithromycin. Like doxycycline, azithromycin is a bacteriostatic antibiotic and works in much the same way. The generic drug name may not ring a bell, but it's commonly sold as Zithromax and Zmax. Azithromycin is used for many of the same problems doxycycline is; for example, it can be used to treat gonorrhea.