There is no known interaction between Lipitor (atorvastatin) and avocado. Lipitor is a medication used to lower cholesterol levels, specifically LDL cholesterol and triglycerides, while increasing HDL cholesterol. Avocado is a nutrient-dense fruit that is high in healthy fats, fiber, vitamins, and minerals. There is no evidence to suggest that consuming avocado while taking Lipitor would cause any adverse effects or interactions.

However, it is important to note that consuming grapefruit or grapefruit juice while taking Lipitor can increase the levels of the medication in the bloodstream, leading to potential side effects such as muscle pain, liver damage, and kidney failure. Therefore, it is recommended to avoid grapefruit and grapefruit juice while taking Lipitor.

In conclusion, there is no known interaction between Lipitor and avocado. It is safe to consume avocado while taking Lipitor as part of a healthy diet. However, it is important to avoid grapefruit and grapefruit juice while taking Lipitor to prevent potential adverse effects.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://ift.onlinelibrary.wiley.com/doi/10.1111/j.1750-3841.2011.02155.x
[3] https://www.rxlist.com/atorvastatin/generic-drug.htm