There is no reason a mother cannot breastfeeding while taking carbimazole or propylthiouracyl. I am not sure about the question of taking this during pregnancy, but I don't think so. However, chances are the mother has postpartum thyroiditis which gets better within a few weeks *spontaneously*, and needs usually to be treated symptomatically only with propranalol (which also does not require stopping breastfeeding). Do not do a thyroid scan to differentiate between postpartum thyroiditis and Grave's disease. It's not necessary. Time will tell. Hey, I thought the Aussies were doing so much better than the rest of us in the English speaking world. Jack Newman, MD, FRCPC