Azithromycin is an antibiotic drug. In the US, its brand name is Zithromax. It is sold under many other brand names in other countries.
Antibiotics fight infections caused by bacteria.
Pfizer manufactures it. Azithromycin is used for mild or moderate bacterial infections. It works against several different bacteria, especially chlamydia, hemophilus and streptococcus. These bacteria can infect the skin, nose, throat, and lungs. They can also be transmitted through sexual activity and cause infections in the genital area.