Lipitor is a medication used to lower cholesterol levels in the body. While taking Lipitor, it is important to avoid certain juices that may interact with the medication. Grapefruit juice is one such juice that should be avoided as it can increase the concentration of Lipitor in the bloodstream and lead to adverse side effects such as muscle pain, weakness, and liver damage [2]. Other citrus juices like orange and tangerine juice should also be avoided as they contain compounds that can interfere with the metabolism of the medication [3]. Additionally, patients taking Lipitor should avoid consuming large amounts of apple juice as it can decrease the effectiveness of the medication [3]. It is important to speak with a healthcare provider or pharmacist about any potential interactions between Lipitor and other medications or foods before starting treatment [1].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.health.harvard.edu/heart-health/grapefruit-juice-and-statins
[3] https://www.renown.org/blog/foods-to-avoid-when-taking-heart-medications