Lipitor is a medication used to lower cholesterol levels in the blood, while avocado is a fruit rich in nutrients and healthy fats. According to the sources provided, there is no evidence of adverse effects when combining Lipitor and avocado.

The first source, Drug Patent Watch [1], provides information about Lipitor's active ingredient, atorvastatin calcium, and its patent expiration date. It does not mention any interactions between Lipitor and avocado.

The second source, a study published in the National Library of Medicine [2], discusses the potential health benefits of avocado consumption, including its positive effects on lipid profiles. The study does not mention any negative interactions between avocado and Lipitor.

The third source, an article from STAT [3], discusses the potential for food-drug interactions and the importance of consulting with a healthcare provider or pharmacist before combining medications and certain foods. However, it does not mention any specific interactions between Lipitor and avocado.

In conclusion, based on the sources provided, there is no evidence of adverse effects when combining Lipitor and avocado. However, it is always recommended to consult with a healthcare provider or pharmacist before combining any medications and foods.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6378490/
[3] https://www.statnews.com/2016/11/03/medications-food-drug-interactions/