According to the sources provided, it appears that there is no direct interaction between Lipitor (atorvastatin) and quercetin. Lipitor is a medication used to lower cholesterol levels, while quercetin is a natural compound found in certain foods and supplements that has antioxidant properties.

The first source, Drug Patent Watch, provides information about Lipitor. It mentions that Lipitor is a statin medication used to reduce LDL cholesterol levels and prevent cardiovascular events. However, it does not mention any specific interactions with quercetin.

The second source, a study published in the Journal of Nutritional Science and Vitaminology, discusses the potential health benefits of quercetin. It mentions that quercetin has anti-inflammatory, antioxidant, and anti-cancer properties. The study does not specifically address any interactions with Lipitor.

The third source, Mount Sinai Health Library, provides information about quercetin as a dietary supplement. It mentions that quercetin is generally safe for most people when taken in appropriate doses. However, it advises caution when combining quercetin with certain medications, such as blood thinners or antibiotics. Lipitor is not mentioned specifically in this source.

Based on the information from these sources, it does not appear that there are any known interactions between Lipitor and quercetin. However, it is always important to consult with a healthcare professional or pharmacist before starting any new medications or supplements, as they can provide personalized advice based on your specific medical history and current medications.

In conclusion, while Lipitor and quercetin do not appear to have any direct interactions based on the provided sources, it is recommended to consult with a healthcare professional for personalized advice and to ensure the safe and effective use of these medications and supplements.

Sources:
[1] Drug Patent Watch: https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] Journal of Nutritional Science and Vitaminology: https://www.sciencedirect.com/science/article/pii/S1110093113000057
[3] Mount Sinai Health Library: https://www.mountsinai.org/health-library/supplement/quercetin