According to the sources provided, there is a potential interaction between Lipitor (atorvastatin) and blood thinners. Lipitor is a medication used to lower cholesterol levels, while blood thinners are used to prevent blood clots.

The Drug Patent Watch [1] notes that there are no known drug interactions between Lipitor and blood thinners. However, Healthline [2] reports that taking Lipitor with blood thinners such as warfarin, heparin, or dabigatran can increase the risk of bleeding. This is because Lipitor can increase the effects of blood thinners, making it more difficult for the blood to clot.

A study published in the National Library of Medicine [3] also suggests that there may be an increased risk of bleeding when taking Lipitor with blood thinners. The study found that patients who were taking Lipitor and warfarin had a higher risk of major bleeding compared to those taking warfarin alone.

It is important to note that not all blood thinners interact with Lipitor in the same way. Healthline [2] notes that some blood thinners, such as aspirin, do not interact with Lipitor in the same way as prescription blood thinners.

If you are taking Lipitor and a blood thinner, it is important to talk to your doctor to discuss the potential risks and benefits of these medications. Your doctor may need to adjust your dosage or monitor you more closely for signs of bleeding.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.healthline.com/health/drugs/lipitor
[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8861410/