Lipitor is a medication used to lower cholesterol levels in the blood. It is important to note that certain foods can interact with Lipitor and affect its effectiveness. Avocado is not listed as a food that interacts with Lipitor [1][2][3]. However, it is recommended that people taking Lipitor avoid consuming grapefruit and grapefruit juice as they can increase the risk of side effects [2][3]. It is also recommended to limit consumption of high-fat and high-cholesterol foods, as they can interfere with the medication's effectiveness [2][3]. It is always advisable to consult with a healthcare provider before making any changes to your diet or medication regimen [2][3].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.prevention.com/food-nutrition/g20509737/what-to-eat-if-you-take-statins/
[3] https://www.guthrie.org/blog/dont-eat-these-foods-if-you-take-blood-thinners-or-statins