Lipitor is a medication used to treat high cholesterol and reduce the risk of heart attack and stroke. According to the drug patent watch [1], Lipitor is a brand name for the drug Atorvastatin, which is a type of statin. Statins are a class of drugs that lower cholesterol levels in the blood by blocking the production of cholesterol in the liver.

The Centers for Disease Control and Prevention (CDC) [2] states that statins can reduce the risk of heart attack and stroke by 25% to 35%. The CDC also notes that the benefits of statins are greatest for people who have a higher risk of heart disease, such as those with high cholesterol, high blood pressure, or diabetes.

The British Heart Foundation [3] also confirms that statins can reduce the risk of heart attacks and strokes by lowering cholesterol levels in the blood. The foundation notes that the amount of risk reduction varies depending on the individual's risk factors and the dose of the medication. However, they suggest that taking statins can reduce the risk of heart attacks and strokes by up to 30%.

In summary, Lipitor (Atorvastatin) is a type of statin that can reduce the risk of heart attack and stroke by blocking the production of cholesterol in the liver. According to the CDC and the British Heart Foundation, statins can reduce the risk of heart attacks and strokes by 25% to 30%, depending on the individual's risk factors and the dose of the medication.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.cdc.gov/cholesterol/docs/Statins-English.pdf
[3] https://www.bhf.org.uk/informationsupport/heart-matters-magazine/medical/statins-fact-or-fiction