Lipitor is a drug blocking cholesterol in the body. Lipitor is applied with a certain diet to decrease cholesterol and fats level in blood. Lipitor is applied to decrease cholesterol low-density lipoproteins (bad cholesterol) level in blood and also it is used to increase cholesterol low-density lipoproteins (good cholesterol) level in blood. It is necessary to decrease risk heart attacks, strokes and peripheral vascular diseases.
Lipitor is applied when other non-medicinal ways cannot decrease cholesterol level in blood such as diet or weight loss.
Now, to understand how the cholesterol level changes in blood, we will consider action of Lipitor.
Lipitor is related to the group of hypolipidemic agents. It reduces cholesterol and lipoproteins levels in plasma due to cholesterol synthesis in liver and increasing hepatic low-density lipoproteins receptors in the cells leading  to strengthening low-density lipoproteins. It blocks mevalonic acid appearance, including cholesterol. Lipitor is quickly absorbed and reveals its action. It has been proved that Lipitor reduces risk of ischemic strokes and death of myocardial infarction.