Lipitor is a prescription drug that is used to lower cholesterol levels in the blood. It is a type of medication called a statin, which works by blocking an enzyme that the liver needs to produce cholesterol. According to the Mayo Clinic [2], statins such as Lipitor have been shown to be effective in reducing LDL (bad) cholesterol levels by up to 50%. The CDC [3] also recommends statins as a treatment option for high cholesterol, stating that they can lower LDL cholesterol levels by an average of 30%.

Lipitor has been on the market since 1997 and has been widely prescribed to millions of patients worldwide. According to DrugPatentWatch [1], Lipitor has been the subject of numerous clinical trials, which have demonstrated its efficacy in reducing cholesterol levels. In fact, Lipitor was the top-selling prescription drug in the world for several years, and its patent protection was one of the most lucrative in the pharmaceutical industry.

In conclusion, Lipitor has been shown to be an effective treatment option for high cholesterol levels. It belongs to a class of drugs called statins, which have been proven to reduce LDL cholesterol levels by up to 50%. Lipitor has been widely prescribed since its introduction in 1997 and has been the subject of numerous clinical trials, which have demonstrated its efficacy in reducing cholesterol levels.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/in-depth/statins/art-20045772
[3] https://www.cdc.gov/cholesterol/treating_cholesterol.htm