Based on the provided sources, there is no direct information regarding the effect of skim milk on Lipitor absorption. However, we can gather some insights from the sources to help us understand the topic.

Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels in the blood. It belongs to a class of drugs called statins [2]. According to the drug patent information, Lipitor is formulated as an oral tablet that should be taken with or without food [1]. The WebMD source confirms that Lipitor can be taken with or without food, but it suggests avoiding grapefruit or grapefruit juice, as they may interact with the medication [2].

The third source, a study published in the National Center for Biotechnology Information (NCBI), discusses the effects of food on the bioavailability of atorvastatin. It mentions that atorvastatin's absorption is affected by food, specifically a high-fat meal, which can decrease the drug's absorption rate [3]. However, skim milk, being low in fat, is not specifically mentioned in the study.

While there is no direct information about skim milk's effect on Lipitor absorption, it is reasonable to assume that skim milk, being low in fat, may not significantly impact the absorption of Lipitor. The study's focus on high-fat meals suggests that fat content plays a more substantial role in the drug's absorption. However, it is essential to consult with a healthcare professional or pharmacist for personalized advice on taking Lipitor with skim milk or any other specific food.

In conclusion, the provided sources do not provide direct information on the effect of skim milk on Lipitor absorption. However, based on the available information, it is reasonable to assume that skim milk, being low in fat, may not significantly affect the absorption of Lipitor. It is always best to consult with a healthcare professional or pharmacist for personalized advice on taking Lipitor with specific foods.

Sources:
[1] Drug Patent Watch. Lipitor - Tradename Details. Retrieved from https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] WebMD. Lipitor Oral: Uses, Side Effects, Interactions, Pictures, Warnings & Dosing. Retrieved from https://www.webmd.com/drugs/2/drug-3330/lipitor-oral/details
[3] National Center for Biotechnology Information (NCBI). The effect of food on the bioavailability of atorvastatin, an HMG-CoA reductase inhibitor. Retrieved from https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1312230/