Generic Zithromax without prescription Zithromax Active Ingredient: Azithromycin Zithromax is used to treat many different types of infections caused by bacteria, such as respiratory infections, skin infections, ear infections, and sexually transmitted diseases. In children, it is used to treat middle ear infection, pneumonia, tonsillitis, and strep throat. Common use: Zithromax is a semi-synthetic macrolide...