Lipitor, also known as atorvastatin, is a medication used to treat high cholesterol levels. According to the American Academy of Pediatrics (AAP), it is classified as a drug that has either unknown or possibly harmful effects on a breastfed infant [1].

Lipitor and other statins can pass into breast milk [2]. However, there is limited information on the potential dangers of Lipitor passing through breast milk. The manufacturer states that it is not known whether Lipitor is excreted in human milk [3].

The AAP advises that, when possible, medications should be given to breastfeeding mothers right after they have breastfed or pumped their breast milk to minimize the amount of medication in the breast milk during the next feeding [1].

It is important to note that the potential risks of not treating high cholesterol in the mother should also be considered. A healthcare provider can help weigh the benefits and risks of taking Lipitor while breastfeeding.

In conclusion, while there is limited information on the potential dangers of Lipitor passing through breast milk, it is known to pass into breast milk and is classified as a drug with unknown or possibly harmful effects on a breastfed infant. It is recommended to consult with a healthcare provider before taking Lipitor while breastfeeding.

Sources:
[1] American Academy of Pediatrics. (2013). Transfer of Drugs and Other Chemicals Into Human Milk. Pediatrics, 132(3), e795-e809. <https://pediatrics.aappublications.org/content/132/3/e795>
[2] Briggs, G. G., Freeman, R. K., & Yaffe, S. J. (2017). Drugs in Pregnancy and Lactation: A Reference Guide to Fetal and Neonatal Risk (11th ed.). Wolters Kluwer.
[3] Pfizer. (2016). Lipitor (atorvastatin calcium) tablets, for oral use. Full Prescribing Information. <https://www.accessdata.fda.gov/drugsatfda_docs/label/2016/020990s053,021110s015lbl.pdf>
[4] DrugPatentWatch.com. (n.d.). Atorvastatin. <https://www.drugpatentwatch.com/drugs/atorvastatin>