Lipitor is a medication used to lower cholesterol levels in the body [2]. It belongs to a class of drugs called statins that work by blocking an enzyme that produces cholesterol in the liver [2]. According to the Drug Patent Watch website, the active ingredient in Lipitor is atorvastatin calcium [1].

Regarding the safety of Lipitor for blood thinner users, there is no direct information available from the provided sources. However, Healthline states that Lipitor can interact with some medications, including blood thinners, which can increase the risk of bleeding [2]. Therefore, it is crucial to inform the doctor about all the medications and supplements being taken before starting Lipitor [2].

Furthermore, a recent study published in the Journal of the American College of Cardiology found that marijuana use could be risky for people taking common heart medications, including blood thinners [3]. The study suggests that marijuana use can interact with these medications, leading to potential adverse effects such as bleeding and blood clots [3]. Therefore, it is essential to discuss marijuana use with a doctor before starting or continuing blood thinners and Lipitor [3].

In conclusion, while there is no direct information available on the safety of Lipitor for blood thinner users, it is crucial to inform the doctor about all the medications and supplements being taken before starting Lipitor. Additionally, marijuana use can be risky for people taking common heart medications, including blood thinners and Lipitor. Therefore, it is essential to discuss marijuana use with a doctor before starting or continuing these medications [2][3].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.healthline.com/health/drugs/lipitor
[3] https://www.nbcnews.com/health/heart-health/marijuana-risky-people-taking-common-heart-medications-n1118181