According to the sources provided, Lipitor (atorvastatin) is a medication used to lower cholesterol levels in the body. The question specifically asks about the risks to a baby if a breastfeeding mother takes Lipitor.

The first source, Drug Patent Watch, provides information about Lipitor but does not specifically address the risks to a baby from Lipitor in breast milk. Therefore, it does not directly answer the question.

The second source, a book published by the National Center for Biotechnology Information (NCBI), discusses the use of medications during breastfeeding. It states that most medications are safe to use while breastfeeding, including Lipitor. However, it is important to note that Lipitor can pass into breast milk, and its effects on a nursing baby are not well studied. Therefore, caution is advised when using Lipitor while breastfeeding.

The third source, a document from the U.S. Food and Drug Administration (FDA), provides information about Lipitor's prescribing information. It mentions that Lipitor is excreted into the milk of lactating rats, but it is unknown whether Lipitor is excreted into human breast milk. The document also advises caution when using Lipitor during breastfeeding and recommends considering the benefits of breastfeeding along with the potential risks to the baby.

In summary, while Lipitor is generally considered safe to use during breastfeeding, there is limited information available regarding its effects on a nursing baby. It is important to consult with a healthcare professional before taking Lipitor while breastfeeding to weigh the potential benefits against the potential risks.

Sources:
[1] Drug Patent Watch: https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] National Center for Biotechnology Information (NCBI): https://www.ncbi.nlm.nih.gov/books/NBK501361/
[3] U.S. Food and Drug Administration (FDA): https://www.fda.gov/media/150774/download