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. Side effects : Diarrhoea Abdominal pain Difficult or painful urination Vomiting Fever Acid or sour stomach Aggression or anger Excessive air or gas in