Lipitor is a brand name for the drug atorvastatin, which is used to lower cholesterol levels in the blood. According to Drugs.com, there are no known interactions between atorvastatin and avocado [3]. However, it is important to note that avocado is a high-fat food and consuming it in excess may lead to weight gain, which can increase cholesterol levels in the blood. Therefore, it is recommended to consume avocado in moderation as part of a healthy and balanced diet [2]. Additionally, MedShadow.org suggests that consuming grapefruit and grapefruit juice should be avoided while taking atorvastatin as it can increase the risk of side effects [2]. It is always recommended to consult with a healthcare provider or a registered dietitian to determine the appropriate diet and medication regimen based on individual health needs and conditions [2].

Sources:
[2] "4 Foods That Can Mess With Your Meds," MedShadow.org, https://medshadow.org/4-foods-can-mess-meds/
[3] "Atorvastatin Drug Interactions," Drugs.com, https://www.drugs.com/drug-interactions/atorvastatin-with-jantoven-276-0-2311-2631.html