Lipitor is a medication used to lower cholesterol levels in the blood. According to the sources provided, there are no specific dairy products that need to be avoided while taking Lipitor. However, it is recommended to avoid consuming grapefruit or grapefruit juice as it can increase the risk of side effects [3]. It is also advisable to limit the intake of high-fat dairy products, such as whole milk, cheese, and butter, as they can increase cholesterol levels in the body [2]. It is essential to follow a healthy diet while taking Lipitor to achieve optimal results. Eating a diet that is low in saturated and trans fats, high in fiber, and rich in fruits, vegetables, and whole grains is recommended [2]. It is always best to consult with a healthcare provider or a registered dietitian to develop a personalized diet plan that meets individual needs and preferences.

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