Lipitor is a medication used to treat high cholesterol levels in the blood. According to the available sources, there is limited information available on the safety of taking Lipitor while breastfeeding. The drug is not recommended for use during breastfeeding unless the potential benefits outweigh the risks.
The drug patent watch website  provides information on the drug, including its indications, dosage, and administration. The website, however, does not provide information on the use of Lipitor during breastfeeding.
The book "Drugs and Lactation Database (LactMed)"  provides information on the use of medications during breastfeeding. According to the book, Lipitor is excreted into human milk in small amounts, and the effects on the infant are unknown. The book recommends caution when using Lipitor during breastfeeding, and suggests monitoring the infant for any adverse effects, such as diarrhea or changes in lipid levels.
The FDA  provides a summary of the prescribing information for Lipitor. According to the information, Lipitor is contraindicated during breastfeeding. The information states that it is not known whether Lipitor is excreted in human milk, and the potential risks to the infant are unknown.
In conclusion, there is limited information available on the safety of taking Lipitor while breastfeeding. The available sources suggest that Lipitor is contraindicated during breastfeeding, and caution should be exercised if it is deemed necessary to use the medication. It is recommended to consult with a healthcare provider before taking Lipitor while breastfeeding.