Concerns regarding the safety of azithromycin in pregnancy - relevance for women with cystic fibrosis.

Chronic oral azithromycin therapy improves clinical outcomes in people with cystic fibrosis (CF), and is recommended for treatment of CF lung disease. Azithromycin is categorized as pregnancy class B. The data for risk of congenital malformations associated with use of azithromycin during pregnancy ranges from no risk to a small increased risk.