Atorvastatin, marketed under the brand name Lipitor, is a medication used to lower cholesterol levels in the blood. According to the sources provided, there is no evidence to suggest that taking Lipitor with dairy products is harmful. However, it is recommended to avoid consuming grapefruit or grapefruit juice while taking this medication as it can increase the risk of side effects. [2][3]

It is important to note that certain foods can interfere with the effectiveness of atorvastatin. For example, foods high in saturated and trans fats, such as red meat, butter, and fried foods, can reduce the medication's ability to lower cholesterol levels. On the other hand, foods high in fiber, such as fruits, vegetables, and whole grains, can help improve the medication's effectiveness. [2]

It is recommended to take Lipitor at the same time every day, with or without food. However, taking it with a meal can help improve its absorption. [1][3]

In summary, there is no evidence to suggest that taking Lipitor with dairy products is harmful. However, it is recommended to avoid consuming grapefruit or grapefruit juice while taking this medication. It is also important to maintain a healthy diet, avoiding foods high in saturated and trans fats, and incorporating foods high in fiber to improve the medication's effectiveness. It is recommended to take Lipitor at the same time every day, with or without food. [1][2][3]

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.singlecare.com/blog/atorvastatin-interactions/