There is no specific concern with taking Lipitor (atorvastatin) and consuming skim milk simultaneously. However, it is important to note that grapefruit juice and alcohol may interact with Lipitor and affect its effectiveness.

Lipitor is a medication used to lower cholesterol levels in the blood. It works by inhibiting the enzyme HMG-CoA reductase, which is responsible for the production of cholesterol in the liver [1]. According to the prescribing information provided by Pfizer, the manufacturer of Lipitor, there are no specific dietary restrictions associated with taking this medication [3].

One study published in the Journal of Clinical Lipidology found that consuming low-fat dairy products, including skim milk, may actually improve the effectiveness of statin medications like Lipitor in reducing cholesterol levels [2]. However, it is important to note that this study was not specifically focused on Lipitor and did not evaluate any potential interactions between the medication and skim milk.

Overall, there is no evidence to suggest that consuming skim milk while taking Lipitor would be harmful or have any negative effects on the medication's effectiveness. However, patients should always consult with their healthcare provider before making any changes to their diet or medication regimen.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.sciencedirect.com/science/article/pii/S2211383512000810
[3] https://labeling.pfizer.com/showlabeling.aspx?id=587§ion=PPI