Lipitor and aspirin are two commonly prescribed medications that are used to treat different conditions. Lipitor is a medication that is used to lower cholesterol levels in the blood, while aspirin is a medication that is used to reduce pain, inflammation, and fever, as well as to prevent blood clots. While both medications are generally safe, they can cause bleeding in some cases.

According to the drug label information on Lipitor [1], bleeding is not listed as a common side effect of the medication. However, it is important to note that Lipitor can interact with other medications that can increase the risk of bleeding, such as warfarin and aspirin. Therefore, it is important to inform your doctor if you are taking any other medications before starting Lipitor.

As for aspirin, it is known to increase the risk of bleeding [2]. Aspirin works by inhibiting the production of blood-clotting cells called platelets. While this can be beneficial in preventing blood clots, it can also increase the risk of bleeding. This risk is particularly high in people who are taking high doses of aspirin or who have a history of bleeding disorders.

In conclusion, while bleeding is not a common side effect of Lipitor, it is important to inform your doctor if you are taking any other medications that can increase the risk of bleeding. As for aspirin, it is known to increase the risk of bleeding, particularly in high doses or in people with a history of bleeding disorders. If you experience any unusual bleeding or bruising while taking these medications, it is important to contact your doctor immediately.

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://www.healthcentral.com/article/aspirin-lipitor-time