Lipitor is a medication that is used to reduce the levels of "bad" cholesterol in the blood. It is a prescription drug that should be taken only as directed by a healthcare provider [1]. According to the information provided by WebMD, there are no known interactions between Lipitor and avocado [2]. Therefore, it is safe to eat avocado while taking Lipitor. In fact, some studies suggest that avocados may have cholesterol-lowering properties and may be beneficial for people with high cholesterol levels [3]. However, it is important to note that avocados are high in fat and calories, so they should be consumed in moderation as part of a healthy diet.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.webmd.com/drugs/2/drug-3330/lipitor-oral/details/list-interaction-food
[3] https://www.wingsets.com/blogs/blog/2591732-why-you-should-trade-your-lipitor-for-an-avocado