Find clinical guidance on Zithromax, including indications, dosing, safety, side effects and evidence-based insights for healthcare professionals. Our trusted physicians rated Zithromax based on efficacy, safety, tolerability, accessibility, and adherence. Learn what doctors have to say about Zithromax. Azithromycin is used to treat many different types of infections caused by bacteria, such as respiratory infections, skin infections, ear infections, eye infections, and sexually transmitted diseases. Azithromycin may also be used for purposes not listed in this medication guide. ZITHROMAX (azithromycin) for injection is a macrolide antibacterial drug indicated for the treatment of patients with infections caused by susceptible strains of the designated microorganisms in. What it is: Azithromycin (Zithromax, Z-Pak)—macrolide antibiotic for community-acquired pneumonia, certain STIs, sinusitis, and some skin infections. Typical dose: Z-Pak: 500 mg on day 1, then 250 mg days 2–5. Azithromycin is used to treat a wide variety of bacterial infections. It is known as a macrolide antibiotic. It works by stopping the growth of bacteria. This antibiotic treats only bacterial infections. It will not work for viral infections (such as common cold, flu). Azithromycin oral tablet is a generic drug. Some strengths of azithromycin oral tablet are available as the brand-name drug Zithromax. Keep reading for specific information about the dosage of. What is Zithromax Z-Pak? Zithromax Z-Pak is used to treat many different types of infections caused by bacteria, including infections of the lungs, sinus, throat, tonsils, skin, urinary tract, cervix, or genitals. Zithromax Z-Pak may also be used for purposes not listed in this medication guide. Overview: Azithromycin is an antibiotic that is used to treat certain bacterial infections. It works by stopping certain types of bacteria from making proteins they need to grow and multiply. Azithromycin is a semi-synthetic antibiotic of the azalide subclass, derived from the classical macrolide erythromycin by the insertion of a methylated nitrogen atom into the 14-membered macrolactone ring, expanding it to a 15-membered ring.