When taking Lipitor (atorvastatin), it is advisable to avoid certain foods that may interact with the medication. Grapefruit and grapefruit juice are known to interact with Lipitor, potentially increasing the risk of side effects. It is recommended to avoid consuming large amounts of grapefruit or grapefruit juice while on Lipitor. Additionally, high-fat meals can interfere with the absorption of Lipitor, so it is recommended to follow a low-fat diet when taking this medication. It is important to consult with a healthcare provider or pharmacist for personalized advice on diet and medication interactions when taking Lipitor [2][3].

Sources:
[2] https://www.healthline.com/health/drugs/lipitor-interactions
[3] https://www.everydayhealth.com/drugs/lipitor