Can azithromycin cuase bacterial vaginosis?

Possible: Use of commonly prescribed antibiotics such as Azithromycin can cause other infections to occur, such as yeast infections and in rare cases bacterial vaginitis. Broad-spectrum antibiotics--ones that kill off many diffrent bacteria--can often destroy normal/healthy bacteria and allow the "bad ones" to grow and cause diseases... Consult your doc..

Vaginosis: The answer is "yes." Azithromycin is an antibiotic. An inevitable side effect any time you take an antibiotic is that you kill off some of the normal bacteria in your system, and they get replaced, at least temporarily, by abnormal bacteria. The cause of bacterial vaginosis is a germ called garderella, which gets a chance to grow in large numbers and cause a symptomatic infection after antibiotics.