Lipitor is a medication used to lower cholesterol levels in the body. It contains the active ingredient atorvastatin, which belongs to a class of drugs called statins [3]. Statins work by blocking an enzyme in the liver that is responsible for producing cholesterol, leading to a decrease in the amount of cholesterol produced by the body [2]. This, in turn, leads to a reduction in LDL cholesterol, also known as "bad" cholesterol, and an increase in HDL cholesterol, or "good" cholesterol [2].

According to DrugPatentWatch [1], Lipitor was first approved by the FDA in 1996 and has since become one of the most commonly prescribed drugs for the treatment of high cholesterol. It is available in tablet form and is typically taken once a day, with or without food [2].

Medical News Today [2] reports that Lipitor is effective in reducing LDL cholesterol levels by up to 60%, depending on the dose and the individual's response to the medication. It may also help to reduce triglyceride levels, another type of fat found in the blood that can contribute to heart disease [2].

It is important to note that Lipitor, like all medications, may cause side effects. The most common side effects include muscle pain and weakness, digestive problems, and an increased risk of developing type 2 diabetes [2]. However, the benefits of taking Lipitor typically outweigh the risks for most people with high cholesterol [3].

In conclusion, Lipitor works by blocking an enzyme in the liver that produces cholesterol, leading to a decrease in LDL cholesterol and an increase in HDL cholesterol. It is an effective medication for reducing cholesterol levels and is commonly prescribed for people with high cholesterol. However, it may cause side effects, and individuals should speak with their healthcare provider to determine if Lipitor is the right medication for them.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.medicalnewstoday.com/articles/248136
[3] https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/in-depth/statins/art-20045772