Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels in the blood [1]. It is not classified as a blood thinner, but rather as a statin [2]. Statins work by inhibiting the production of cholesterol in the liver, which can help reduce the risk of heart attack and stroke [3].

While Lipitor is not a blood thinner, it is important to note that it can interact with certain blood thinning medications, such as warfarin [2]. This interaction can increase the risk of bleeding, as both medications can affect the body's ability to form blood clots [2]. Therefore, it is important for patients taking both Lipitor and a blood thinner to be closely monitored by their healthcare provider for any signs of bleeding or bruising [3].

In summary, Lipitor is not a blood thinner, but it can interact with blood thinning medications and increase the risk of bleeding. Patients taking both Lipitor and a blood thinner should be closely monitored by their healthcare provider [1][2][3].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.singlecare.com/blog/is-atorvastatin-a-blood-thinner/
[3] https://www.tampaveinspecialists.com/do-my-cholesterol-drugs-thin-my-blood/