Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels in the blood. The drug works by blocking an enzyme that produces cholesterol in the liver [2]. According to Drug Patent Watch [1], Lipitor is the best-selling drug of all time, with over $125 billion in sales since its approval by the FDA in 1996.

The effectiveness of Lipitor is not dependent on a low-fat diet. However, a low-fat diet can help to lower cholesterol levels in the blood and can be used in conjunction with Lipitor to achieve optimal results [2]. The drug should be taken as prescribed by a healthcare provider and should not be discontinued without medical advice.

According to a study published in the National Library of Medicine [3], atorvastatin was found to be highly effective in reducing LDL cholesterol levels in patients with hypercholesterolemia, regardless of their dietary habits. The study found that patients who adhered to a low-fat diet in combination with atorvastatin had a greater reduction in LDL cholesterol levels than those who did not follow a low-fat diet. However, the study concluded that atorvastatin alone was still highly effective in reducing LDL cholesterol levels, regardless of dietary habits.

In conclusion, Lipitor, also known as atorvastatin, is a highly effective medication for lowering cholesterol levels in the blood. While a low-fat diet can be used in conjunction with Lipitor to achieve optimal results, the drug is still effective regardless of dietary habits. It is important to follow the prescribed dosage of Lipitor and not to discontinue the medication without medical advice.

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