Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels in the body. It is not a blood thinner, but it is important to know if it can increase the risk of bleeding when taken with other blood thinners. According to the sources provided, there is no direct evidence to suggest that Lipitor increases bleeding risk when taken with other blood thinners.

DrugPatentWatch [1] states that Lipitor is a cholesterol-lowering medication that works by inhibiting an enzyme involved in cholesterol synthesis. It does not have any direct effect on blood clotting or thinning.

Mayo Clinic [2] suggests that herbal supplements can increase the risk of bleeding when taken with blood thinners. However, Lipitor is not listed as an herbal supplement, and there is no mention of Lipitor increasing bleeding risk when taken with blood thinners.

SingleCare [3] confirms that Lipitor is not a blood thinner, but a cholesterol-lowering medication. The article also states that Lipitor is not known to increase the risk of bleeding when taken with other blood thinners.

In conclusion, there is no direct evidence to suggest that Lipitor increases bleeding risk when taken with other blood thinners. However, it is always important to consult with a healthcare provider before taking any medication, especially if you are taking other medications or have any underlying medical conditions.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.mayoclinic.org/healthy-lifestyle/consumer-health/in-depth/herbal-supplements/art-20046488
[3] https://www.singlecare.com/blog/is-atorvastatin-a-blood-thinner/