Lipitor is a brand name for the drug atorvastatin, which belongs to a class of medications called statins. Statins are commonly used to lower cholesterol levels and reduce the risk of heart disease. The drug works by inhibiting an enzyme called HMG-CoA reductase, which is responsible for producing cholesterol in the liver [1].

Research has shown that Lipitor can affect clotting factors in the blood. One study found that atorvastatin can reduce the levels of a protein called von Willebrand factor (vWF), which is involved in blood clotting [2]. Another study found that atorvastatin can reduce the activity of a clotting factor called factor VII, which is also involved in blood clotting [3].

While these findings suggest that Lipitor may have some anticoagulant effects, it is important to note that the drug is not typically used as a blood thinner. Rather, it is used to lower cholesterol levels and reduce the risk of heart disease. If you are taking Lipitor or any other medication and have concerns about its effects on blood clotting, it is important to speak with your healthcare provider.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ahajournals.org/doi/full/10.1161/01.atv.0000151647.14923.ec
[3] https://pubmed.ncbi.nlm.nih.gov/15569822/