Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels in the body. According to Drug Patent Watch [1], Lipitor was first approved by the FDA in 1996 and is still under patent protection until 2021. The medication works by inhibiting an enzyme in the liver that is responsible for producing cholesterol, which in turn lowers the amount of cholesterol in the bloodstream.

A study published in PubMed [2] found that Lipitor was effective in reducing total cholesterol levels in patients with hypercholesterolemia, a condition characterized by high levels of cholesterol in the blood. The study also found that Lipitor was effective in reducing LDL cholesterol, also known as "bad" cholesterol, and increasing HDL cholesterol, or "good" cholesterol.

WebMD [3] notes that Lipitor is typically prescribed in conjunction with a healthy diet and exercise regimen. The medication is available in tablet form and is taken orally once daily. The dosage and duration of treatment may vary depending on the individual patient's needs and medical history.

In conclusion, Lipitor is a medication that is used to lower cholesterol levels in the body. It works by inhibiting an enzyme in the liver that is responsible for producing cholesterol. Studies have shown that Lipitor is effective in reducing total cholesterol levels, LDL cholesterol, and increasing HDL cholesterol. It is typically prescribed in conjunction with a healthy diet and exercise regimen. However, it is important to note that Lipitor may not be suitable for everyone, and individuals should consult with their healthcare provider before starting any new medication.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://pubmed.ncbi.nlm.nih.gov/11277825/
[3] https://www.webmd.com/drugs/2/drug-3330/lipitor-oral/details