Based on the provided sources, Lipitor (atorvastatin) is a commonly prescribed medication used to lower cholesterol levels in the body. It belongs to a class of drugs called statins and is primarily used to reduce the risk of heart disease and stroke [1].

Regarding the interaction between Lipitor and orange juice, it is important to note that none of the provided sources specifically mention the impact of orange juice on Lipitor absorption. However, there is some information available on the interaction between grapefruit juice and certain medications, including statins like Lipitor.

According to the U.S. Food and Drug Administration (FDA), grapefruit juice can interfere with the absorption of certain medications, including some statins. Grapefruit juice contains compounds that inhibit an enzyme called CYP3A4, which plays a role in the metabolism of many drugs. When this enzyme is inhibited, it can lead to higher levels of the medication in the bloodstream, potentially increasing the risk of side effects [3].

While the sources do not mention orange juice specifically, it is important to exercise caution when consuming any citrus juices while taking medications. It is recommended to consult with a healthcare professional or pharmacist to determine if there are any specific interactions between Lipitor and orange juice.

In conclusion, based on the provided sources, there is no direct information on the impact of orange juice on Lipitor absorption. However, it is advisable to exercise caution and consult with a healthcare professional or pharmacist regarding the potential interactions between Lipitor and citrus juices like orange juice.

Sources:
[1] DrugPatentWatch: Lipitor. Retrieved from https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] National Center for Biotechnology Information: Atorvastatin: Review of Clinical Trials and Future Directions. Retrieved from https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3589309/
[3] U.S. Food and Drug Administration: Grapefruit Juice and Some Drugs Don't Mix. Retrieved from https://www.fda.gov/consumers/consumer-updates/grapefruit-juice-and-some-drugs-dont-mix