Lipitor (atorvastatin) and aspirin are commonly used drugs for different medical conditions. Lipitor is a medication used to lower cholesterol levels, while aspirin is a nonsteroidal anti-inflammatory drug (NSAID) used for pain relief and to reduce inflammation.

According to Drugs.com, there are no known interactions between aspirin and Lipitor, and they can be taken together safely. However, it is always advisable to consult a healthcare professional before taking any new medications or supplements.

A study published in the American Heart Journal found that the combination of aspirin and Lipitor was safe and effective in reducing the risk of cardiovascular events in patients with stable coronary artery disease. The study also found that the combination therapy did not increase the risk of bleeding or liver damage [1].

Another study published in the Journal of Clinical Pharmacology found that there were no significant interactions between aspirin and Lipitor in healthy volunteers [2].

In conclusion, based on the provided sources, there are no known interactions between aspirin and Lipitor, and they can be taken together safely. However, it is always important to consult a healthcare professional before taking any new medications or supplements.

Sources:
[1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2921584/
[2] https://pubmed.ncbi.nlm.nih.gov/12616654/