Doxycycline is a tetracycline antibiotic. Serum levels in tetracycline exposed nursing infants are undetectable (less than 0.05 ug/mL) since the tetracycline and doxycycline would be bound to the calcium in the mother's milk. Thus the THEORETICAL risk for staining teeth is remote. The AAP considers tetracycline to be compatible with breastfeeding. Frank J.Nice, DPA, CPHP *********************************************** The LACTNET mailing list is powered by L-Soft's renowned LISTSERV(R) list management software together with L-Soft's LSMTP(TM) mailer for lightning fast mail delivery. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html