Lipitor is a medication used to lower cholesterol levels in the blood. Grapefruit and its juice can interact with certain medications, including Lipitor, and increase the risk of side effects. According to sources [2] and [3], grapefruit juice can increase the level of Lipitor in the blood, which can lead to an increased risk of side effects such as muscle pain and liver damage. Therefore, it is recommended to avoid consuming grapefruit or grapefruit juice while taking Lipitor. It is also important to note that the interaction between grapefruit and Lipitor can last for up to 72 hours, so it is advisable to avoid grapefruit products for at least three days before and after taking Lipitor. Patients should always consult with their healthcare provider before making any changes to their medication or diet.

Sources:
[2] https://www.verywellhealth.com/can-i-take-lipitor-or-zocor-with-grapefruit-juice-1124045
[3] https://ro.co/health-guide/lipitor-and-grapefruit/