Lipitor (atorvastatin) is a medication that is used to lower cholesterol levels in the blood. It is important to note that certain foods can interact with Lipitor and affect its effectiveness. Therefore, it is recommended to avoid consuming grapefruit or grapefruit juice while taking Lipitor as it can increase the levels of the medication in the bloodstream and lead to potential side effects. Additionally, high-fat meals can also reduce the absorption of Lipitor and decrease its effectiveness. Therefore, it is recommended to follow a healthy diet that is low in saturated and trans fats while taking Lipitor to achieve the best results.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.everydayhealth.com/drugs/lipitor
[3] https://www.healthline.com/health/drugs/lipitor-interactions