Lipitor (atorvastatin) is a medication that is used to lower cholesterol levels in the blood. It is classified as a statin drug and is used to reduce the risk of heart attack and stroke in patients with high cholesterol levels.

According to Everyday Health [2], when taking Lipitor, it is recommended to follow a low-fat diet to maximize the effectiveness of the medication. This means that patients should avoid foods that are high in saturated and trans fats, such as fried foods, fatty meats, and full-fat dairy products. Instead, patients should focus on consuming foods that are high in fiber, such as fruits, vegetables, and whole grains.

Additionally, Healthgrades [3] recommends that patients taking Lipitor should avoid consuming grapefruit and grapefruit juice, as they can interfere with the metabolism of the medication and increase the risk of side effects.

It is important to note that the recommended fat restrictions may vary depending on the individual patient's health status and medical history. Patients should always consult with their healthcare provider or a registered dietitian to determine the appropriate dietary guidelines for their specific needs.

Sources:
[2] https://www.everydayhealth.com/drugs/lipitor
[3] https://www.healthgrades.com/right-care/cholesterol/what-foods-to-avoid-while-taking-atorvastatin