Lipitor is a medication used to lower cholesterol levels in the blood. It is also known by its generic name, atorvastatin [2]. According to Drug Patent Watch [1], Lipitor works by inhibiting an enzyme called HMG-CoA reductase, which is responsible for producing cholesterol in the liver. By blocking this enzyme, Lipitor reduces the amount of cholesterol produced by the liver, resulting in lower levels of cholesterol in the bloodstream.

WebMD [2] explains that Lipitor is a type of medication called a statin. Statins work by blocking the production of cholesterol in the liver, which in turn reduces the amount of cholesterol in the bloodstream. This can help to prevent the buildup of plaque in the arteries, which can lead to heart disease and stroke.

According to Drugs.com [3], Lipitor is typically taken once a day, with or without food. It is important to take the medication at the same time each day to maintain consistent levels in the bloodstream. Patients should also avoid consuming grapefruit or grapefruit juice while taking Lipitor, as this can increase the risk of side effects.

In summary, Lipitor works by inhibiting the production of cholesterol in the liver, which can help to lower cholesterol levels in the bloodstream and reduce the risk of heart disease and stroke. It is important to take Lipitor as directed by a healthcare provider and to avoid consuming grapefruit or grapefruit juice while taking the medication [1][2][3].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.webmd.com/drugs/2/drug-3330/lipitor-oral/details
[3] https://www.drugs.com/tips/lipitor-patient-tips