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 (Zithromax) is an antibiotic medication that treats bacterial infections. It doesn’t treat viral infections. Discover how Azithromycin 500 is used, dosage guidelines, benefits and side effects. Learn how to take it and who should avoid it from our expert doctor. Azithromycin is an antibiotic that fights bacteria. 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 belongs to the class of drugs known as macrolide antibiotics. It works by killing bacteria or preventing their growth. However, this medicine will not work for colds, flu, or other virus infections. This medicine is available only with your doctor's prescription. Azithromycin is used to treat a variety of bacterial infections including ARDS, sinusitis, pneumonia, and acute bronchitis. Learn about side effects, drug interactions, dosages, warnings, and more. Antibacterial agents used in high doses for short periods of time to treat nongonococcal urethritis may mask or delay symptoms of incubating syphilis or gonorrhea. Azithromycin is an effective antibiotic that is used for the treatment of many bacterial infections. Compared to other antibiotics, Azithromycin has a longer half-life which means that it stays in the body for a long time because of which it is given once a day and for a short span of time. Medscape - Infection-specific dosing for Zithromax (azithromycin), frequency-based adverse effects, comprehensive interactions, contraindications, pregnancy & lactation schedules, and cost. Find drug information for Azithromycin on CVS.com, including related drug classes, side effects, dosage, and answers to frequently asked questions.