Lipitor is a brand name for the drug atorvastatin, which is a type of statin medication used to lower cholesterol levels in the blood [1]. According to sources [2][3], it is recommended to avoid consuming grapefruit or grapefruit juice while taking Lipitor. Grapefruit contains a group of compounds called furanocoumarins, which can interfere with the metabolism of certain medications, including statins like Lipitor. This interference can lead to higher levels of the medication in the blood, increasing the risk of side effects [2]. While some other citrus fruits may also contain furanocoumarins, grapefruit is the most commonly associated with this interaction [3]. It is important to note that this interaction is not limited to Lipitor and can occur with other statins as well. Patients taking statins are advised to consult with their healthcare provider or pharmacist regarding the consumption of grapefruit or grapefruit juice [2][3].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.verywellhealth.com/can-i-take-lipitor-or-zocor-with-grapefruit-juice-1124045
[3] https://www.goodrx.com/classes/statins/why-cant-i-have-grapefruit-with-my-statin