Lipitor is a brand name for the drug atorvastatin, which is classified as a statin drug [1]. Statins are a class of drugs that are commonly prescribed to lower cholesterol levels in the body [2]. Lipitor works by inhibiting the enzyme HMG-CoA reductase, which is responsible for producing cholesterol in the liver [2]. By inhibiting this enzyme, Lipitor reduces the amount of cholesterol that is produced by the liver, which in turn lowers the levels of LDL (bad) cholesterol in the blood [2]. Additionally, Lipitor can increase the levels of HDL (good) cholesterol in the blood [3]. This combination of reducing LDL cholesterol and increasing HDL cholesterol can help to reduce the risk of heart disease and stroke [3]. It is important to note that Lipitor and other statin drugs should be used under the guidance of a healthcare provider, as they can have potential side effects and may interact with other medications [2].

Sources:
[1] DrugPatentWatch. (n.d.). Lipitor. Retrieved October 6, 2021, from https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] Mayo Clinic. (2020, August 29). Statins: Are these cholesterol-lowering drugs right for you? Retrieved October 6, 2021, from https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/in-depth/statins/art-20045772
[3] Medical News Today. (2018, July 30). How does Lipitor work? Retrieved October 6, 2021, from https://www.medicalnewstoday.com/articles/248136