To : Pat Re : Zithromax There has been a nice article published showing that zithromax levels in breastmilk are very low. In addition, Zithromax was cleared for pediatric use this year. Regards Tom Hale, Ph.D. Kelsey JJ, Moser LR, Jennings JC, et.al. Presence of azithromycin breast milk concentrations: A case report. Am. J. Obstet. Gynecol. 170:1375-6, 1994.