Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels in the blood. The drug works by blocking an enzyme that produces cholesterol in the liver [1]. As for the effect of Lipitor on nursing babies, the available sources do not provide a clear answer.

According to the FDA, Lipitor is classified as a pregnancy category X drug, which means that it is contraindicated during pregnancy [3]. The drug can cause harm to the fetus and may lead to birth defects. However, the FDA does not provide information on whether Lipitor can be passed to a nursing baby through breast milk.

The National Center for Biotechnology Information (NCBI) states that there is limited information available on the transfer of atorvastatin to breast milk and its effects on nursing infants. The NCBI recommends caution when prescribing Lipitor to nursing mothers and suggests monitoring the infant for any adverse effects [2].

Drug Patent Watch, a pharmaceutical intelligence database, does not provide information on the transfer of atorvastatin to breast milk or its effects on nursing infants [1].

In conclusion, while Lipitor is contraindicated during pregnancy, there is limited information available on the transfer of atorvastatin to breast milk and its effects on nursing infants. Nursing mothers should exercise caution when taking Lipitor and consult with their healthcare provider to determine the best course of action. Monitoring the infant for any adverse effects is also recommended [2].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/books/NBK501361/
[3] https://www.fda.gov/media/150774/download