Azithromycin is one of the world's best-selling , and is derived from erythromycin; however, it differs chemically from erythromycin in that a -substituted nitrogen atom is incorporated into the lactone ring, thus making the lactone ring 15-membered. Azithromycin is used to treat or prevent certain bacterial infections, most often those causing middle ear infections, tonsillitis, throat infections, laryngitis, bronchitis, pneumonia, Typhoid, and sinusitis. In recent years it has primarily been used to prevent bacterial infections in infants and those with weaker immune systems. It is also effective against certain urinary tract infections, such as non-gonococcal urethritis and cervicitis. Recent studies have also indicated it to be effective against late-onset asthma, but these findings are controversial and not widely accepted.Uses :Azithromycin is used to treat a wide variety of bacterial infections. 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, flu). Unnecessary use or misuse of any antibiotic can lead to its decreased effectiveness.Other Information :Doses : 1 Tablets in a dayPack : 3 Tablets in a Strip