PCOS - Metformin While Breastfeeding
By Samuel Thatcher, MD, Ph.D.

Q. I am currently 8 months pregnant. I have PCOS and conceived while using Metformin. I've been on it throughout my pregnancy and thankfully I've had an uneventful pregnancy. I want to know if it is ok to stay on the met while I breastfeed or should I go off it until I stop breastfeeding. What are the dangers of staying on Met to the baby while breastfeeding? Thank you so much!

A. Metformin is released in breast milk. Most recommend not using Metformin while breastfeeding, although there is no specific research studies that I know of indicating that it will be of harm. Discuss your situation with your doctor/pediatrician.