Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels in the body. It works by blocking an enzyme that produces cholesterol in the liver, thereby reducing the amount of cholesterol in the bloodstream [3]. According to Drug Patent Watch [1], Lipitor is the most widely prescribed medication for lowering cholesterol in the United States.

A study published in the National Library of Medicine [2] found that low-fat diets can significantly reduce cholesterol levels, and when combined with atorvastatin, can lead to even greater reductions in cholesterol levels. The study also found that a low-fat diet combined with atorvastatin was more effective than a low-fat diet alone in reducing LDL cholesterol levels, which is often referred to as "bad" cholesterol.

WebMD [3] recommends that individuals taking Lipitor follow a low-fat diet to maximize the effectiveness of the medication. They suggest that a diet low in saturated and trans fats, and high in fruits, vegetables, and whole grains can help to lower cholesterol levels and reduce the risk of heart disease.

In conclusion, combining a low-fat diet with Lipitor can be an effective way to lower cholesterol levels. A low-fat diet can significantly reduce cholesterol levels on its own, but when combined with Lipitor, can lead to even greater reductions in cholesterol levels. It is recommended that individuals taking Lipitor follow a low-fat diet to maximize the effectiveness of the medication [2][3].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1312230/
[3] https://www.webmd.com/drugs/2/drug-3330/lipitor-oral/details