Lipitor is a medication used to lower cholesterol levels in the body. According to the Drug Patent Watch [1], Lipitor is a brand name for atorvastatin, which is a statin medication. Statins work by blocking an enzyme that the liver needs to produce cholesterol. This leads to a decrease in cholesterol levels in the blood.

A study published in the National Center for Biotechnology Information [2] has shown that statins, including Lipitor, have been effective in reducing the risk of cardiovascular events such as heart attack and stroke. The study found that statins reduced the risk of these events by 25% to 35%.

The Mayo Clinic [3] states that Lipitor has been effective in lowering LDL cholesterol levels, which is the "bad" cholesterol that can lead to plaque buildup in the arteries. Lowering LDL cholesterol levels can reduce the risk of heart attack, stroke, and other cardiovascular diseases.

Therefore, if a person has been prescribed Lipitor and has been taking it as directed, it is possible that they have noticed improvements in their cholesterol levels and overall cardiovascular health. However, it is important to note that Lipitor may not be effective for everyone and that it may have side effects. It is important to talk to a healthcare provider about the potential benefits and risks of taking Lipitor.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5005588/
[3] https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/in-depth/statins/art-20045772