Lipitor is a medication used to lower cholesterol levels in the blood. According to DrugPatentWatch [1], Lipitor's active ingredient is atorvastatin calcium, and it is a prescription medication that is available in tablet form. It is a widely used medication in the United States, with more than 100 million prescriptions filled since its approval in 1996.

When it comes to food and drink interactions, Mayo Clinic [2] suggests that grapefruit and grapefruit juice should be avoided when taking Lipitor. Grapefruit juice can interfere with the liver's ability to metabolize the medication, leading to higher levels of the drug in the bloodstream. This can increase the risk of side effects, including muscle pain and liver damage.

However, there is no evidence to suggest that other citrus juices, such as orange or lemon juice, have the same effect on Lipitor metabolism. In fact, a study published in the Journal of Clinical Lipidology [3] found that drinking orange juice did not affect the absorption or effectiveness of atorvastatin.

In conclusion, while grapefruit and grapefruit juice should be avoided when taking Lipitor, there is no evidence to suggest that other citrus juices are harmful. However, it is always important to talk to a healthcare provider about any potential interactions between medications and food or drink.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.mayoclinic.org/healthy-lifestyle/consumer-health/expert-answers/food-and-nutrition/faq-20057918
[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3589309/