Why is this medication prescribed?
Azithromycin(Zithromax) is used to treat certain infections caused by bacteria, such as bronchitis; pneumonia; sexually transmitted diseases (STD); and infections of the ears, lungs, skin, and throat. Azithromycin is in a class of medications called macrolide antibiotics. It works by stopping the growth of bacteria. Antibiotics will not work for colds, flu, or other viral infections.
www.ncbi.nlm.nih.gov/pubmedhealth/PMH0001009I've used it for sinus infections too.
Is that the info you wanted or did you want to know what it was used for as in treating Lyme Disease?