Laura: I agree with Dr. Hale's comments, and would add that as previously discussed the cholesterol during lactation often has a high HDL component which makes it less risky. If this woman was already on mevacor prior to her pregnancy, perhaps she is older(i.e. closer to the menopause) and/or has other cardiac risk factors such as high blood pressure, diabetes, smoking and a family history of early heart attacks. In the absence of these, and if her cholesterol level was not much over 300 total with a high proportion of HDL, it would be better to breastfeed without mevacor and re-evaluate after she weans. Hope this helps. Alicia. [log in to unmask]