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 (Zithromax) is a macrolide antibiotic. It's used to treat many types of infections in children and adults, including strep throat, sinus infection, and pneumonia. Azithromycin may cause diarrhea, and in some cases it can be severe. It may occur 2 months or more after you stop using this medicine. Do not take any medicine to treat diarrhea without first checking with your doctor. Diarrhea medicines may make the diarrhea worse or make it last longer. Azithromycin oral tablet (Zithromax) is a prescription drug that's used to treat infections caused by bacteria. Learn about uses, dosage, and more. Azithromycin is in a class of medications called macrolide antibiotics. It works by stopping the growth of bacteria. Antibiotics such as azithromycin will not work for colds, flu, or other viral infections. Using antibiotics when they are not needed increases your risk of getting an infection later that resists antibiotic treatment. Detailed Azithromycin dosage information for adults and children. Includes dosages for Bacterial Infection, Sinusitis, Bronchitis and more; plus renal, liver and dialysis adjustments. Azithromycin, sold under the brand names Zithromax (in oral form) and Azasite (as an eye drop), is an antibiotic medication used to treat several bacterial infections. [9] Azithromycin is used to treat certain bacterial infections (including sinusitis, pneumonia, ARDS, and acute bronchitis). It is a macrolide-type antibiotic. It works by stopping the growth of bacteria. This medication will not work for viral infections (such as common cold, or flu). Azithromycin is a macrolide primarily prescribed to treat bacterial infections, including community-acquired pneumonia and sexually transmitted infections. This activity addresses the indications, mechanism of action, and contraindications of azithromycin, emphasizing critical factors such as admini … 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..