Lipitor is a medication used to lower cholesterol levels in the body. According to the available sources, there is limited information on whether Lipitor passes through breast milk. The drug patent watch website [1] mentions that there is no data available on the excretion of atorvastatin, the active ingredient in Lipitor, in human milk. However, the website suggests that because atorvastatin has a high degree of protein binding, it is unlikely to be excreted in significant amounts into breast milk.

The book "Drugs During Pregnancy and Lactation: Treatment Options and Risk Assessment" [2] also notes that the amount of atorvastatin that passes into breast milk is likely to be low. However, the book recommends caution and suggests that breastfeeding mothers should consult their healthcare provider before taking Lipitor.

The US Food and Drug Administration (FDA) [3] also recommends caution when using Lipitor during breastfeeding. The FDA advises healthcare providers to consider the benefits and risks of Lipitor for the mother and the potential risks to the infant before prescribing the medication to a breastfeeding mother.

In summary, there is limited information available on whether Lipitor passes through breast milk. While it is unlikely to be excreted in significant amounts, caution is recommended when using Lipitor during breastfeeding. It is important for breastfeeding mothers to consult their healthcare provider before taking Lipitor to weigh the benefits and risks of the medication.

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