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 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 250 mg tablets are bioequivalent to 250 mg capsules in the fasted state. Azithromycin 250 mg capsules are no longer commercially available. 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 used to treat infections caused by bacteria. It is also used to treat and prevent disseminated Mycobacterium avium complex (MAC) infection [a type of lung infection that affects people with a suppressed immune system). Azithromycin (Zithromax) is an antibiotic medication that treats bacterial infections. It doesn’t treat viral infections. Azithro 250mg Tablet is an antibiotic that works by inhibiting bacterial protein synthesis. It binds to the bacterial ribosome and prevents the production of essential proteins required for bacterial growth and survival, thereby stopping the infection from spreading. For information purposes only. Z-Pak is a prescription antibiotic with six 250 mg tablets of azithromycin in a blister pack. It can treat several bacterial infections, including strep throat, ear infections, and pneumonia. Azithromycin tablets come in strengths of 250mg or 500mg. The capsules are 250mg. The liquid comes as 200mg in 5ml. The usual adult dose is 500mg a day for 3 to 10 days depending on the infection being treated. For some infections, you'll be given a one-off higher dose of 1g or 2g.