Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels in the blood by inhibiting the HMG-CoA reductase enzyme, which plays a crucial role in the production of cholesterol in the body [1].

The HMG-CoA reductase enzyme is responsible for converting HMG-CoA to mevalonate, an early step in the cholesterol synthesis pathway [2]. By inhibiting this enzyme, Lipitor reduces the production of cholesterol in the liver, leading to a decrease in the overall cholesterol levels in the body.

In addition to its cholesterol-lowering effects, Lipitor has also been shown to stabilize atherosclerotic plaques, reduce inflammation, and improve endothelial function [3]. These effects may contribute to the cardiovascular benefits of Lipitor and other statins.

It's important to note that Lipitor is a prescription medication and should only be used under the guidance of a healthcare professional. Potential side effects and drug interactions should be discussed with a doctor before starting this medication.

Sources:

1. <https://www.drugs.com/lipitor.html>
2. <https://www.ncbi.nlm.nih.gov/books/NBK22152/>
3. <https://www.drugpatentwatch.com/drugs/lipitor>