阿奇霉素（Azithromycin, 英语发音：/əˌzɪθroʊˈmaɪsɨn/ ）是一种属于大环内酯的抗生素，于1980年被发现，1981年推出。又翻译作阿红霉素、阿齐红霉素。

Azithromycin is an antibiotic useful for the treatment of a number of bacterial infections. This includes middle ear infections, strep throat, pneumonia, traveler's diarrhea, and certain other intestinal infections. It may also be used for a number of sexually transmitted infections including chlamydia and gonorrhea infections. Along with other medications, it may also be used for malaria. It can be taken by mouth or intravenously with doses once per day.