Lipitor is a brand name for the drug atorvastatin, which is used to lower cholesterol levels in the body. According to the sources provided, there are no specific yogurt restrictions with Lipitor. However, it is recommended to avoid consuming grapefruit or grapefruit juice while taking atorvastatin as it can increase the risk of side effects. Additionally, it is important to be mindful of the foods you eat while taking atorvastatin, as certain foods can interfere with the absorption of the medication and decrease its effectiveness. For example, high-fat foods should be avoided as they can reduce the absorption of atorvastatin. It is recommended to follow a healthy diet and speak with a healthcare provider about any concerns or questions regarding medication and diet.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.nkch.org/blog/foods-that-can-fool-with-your-meds
[3] https://www.healthgrades.com/right-care/cholesterol/what-foods-to-avoid-while-taking-atorvastatin