Lipitor (atorvastatin) is a medication used to treat high cholesterol levels. The safety of Lipitor during breastfeeding is not well established. According to the FDA, atorvastatin is excreted into human milk, and because of the potential for serious adverse reactions in nursing infants, women who are taking Lipitor should not breastfeed their infants [3].

The drug patent watch website indicates that there is no information available on the use of Lipitor during breastfeeding, and the drug should be used with caution in nursing mothers [1].

A book chapter from the National Center for Biotechnology Information states that the use of atorvastatin during breastfeeding should be avoided if possible due to the lack of data on its safety. The chapter also suggests that if a nursing mother needs to take atorvastatin, she should consider temporarily discontinuing breastfeeding and using alternative methods to feed her infant [2].

In summary, the use of Lipitor during breastfeeding is not recommended due to the potential for serious adverse reactions in nursing infants. Women who are taking Lipitor should not breastfeed their infants. If a nursing mother needs to take atorvastatin, she should consider temporarily discontinuing breastfeeding and using alternative methods to feed her infant.

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