Lipitor is a brand name for the generic drug atorvastatin, which is a medication used to lower cholesterol levels in the blood. According to the sources provided, there is no known interaction between guacamole and Lipitor. However, it is important to note that certain foods can interfere with the effectiveness of Lipitor and other medications. For example, grapefruit and grapefruit juice can increase the risk of side effects from Lipitor [3]. Additionally, high-fat meals can reduce the absorption of Lipitor and other statins [3]. Therefore, it is recommended to follow a healthy diet while taking Lipitor and to avoid consuming large amounts of grapefruit or high-fat foods. As with any medication, it is important to consult with a healthcare provider before making any changes to your diet or medication regimen [2].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.rxlist.com/lipitor-drug.htm
[3] https://medshadow.org/4-foods-can-mess-meds/