Based on the available information, there is no specific mention or study about the combination of Lipitor (Atorvastatin) and Heparin.

Lipitor, a statin, is a medication used to lower cholesterol levels [1]. It works by blocking a substance your body needs to make cholesterol [1]. Heparin, on the other hand, is an anticoagulant, a type of medication that prevents the formation of blood clots [3]. It does this by activating a natural anticoagulant called antithrombin III [3].

While there is no specific information about the combination of these two drugs, it is important to note that both medications can have interactions with other drugs. For instance, according to the information from the first source, Lipitor can interact with warfarin, another type of anticoagulant [1].

The second source discusses the use of heparin in patients who have undergone percutaneous coronary intervention (PCI), a type of procedure that opens up blocked coronary arteries [2]. This source does not mention the use of Lipitor in conjunction with heparin [2].

The third source is a study about the use of heparin in patients with acute coronary syndrome [3]. This study does not mention the use of Lipitor or any other statins [3].

Therefore, while there is no specific information about the combination of Lipitor and heparin, it is crucial to inform healthcare providers about all medications, including over-the-counter drugs and supplements, to avoid potential drug interactions.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4950528/
[3] https://pubmed.ncbi.nlm.nih.gov/15326073/