Lipitor is a medication that is primarily used to treat high cholesterol levels in the body. However, it has also been shown to be effective in treating low levels of high-density lipoprotein (HDL) cholesterol, commonly referred to as "good" cholesterol [2][3]. HDL cholesterol is responsible for removing excess cholesterol from the bloodstream and transporting it to the liver for removal from the body. Low levels of HDL cholesterol have been linked to an increased risk of heart disease [2].

According to a study published in the Journal of Clinical Lipidology, treatment with Lipitor has been shown to increase HDL cholesterol levels by an average of 6.4% [3]. This study also found that Lipitor was effective in reducing LDL cholesterol levels by an average of 39.1%. The study concluded that Lipitor was an effective treatment option for patients with both high LDL and low HDL cholesterol levels [3].

Another study published in the American Journal of Cardiology found that Lipitor was effective in increasing HDL cholesterol levels in patients with metabolic syndrome, a condition characterized by a combination of high blood pressure, high blood sugar, and excess body fat around the waist [2]. The study found that treatment with Lipitor resulted in a significant increase in HDL cholesterol levels, as well as a decrease in triglyceride levels [2].

In summary, Lipitor has been shown to be effective in increasing HDL cholesterol levels in patients with low levels of this important lipid. However, it is important to note that Lipitor is a prescription medication and should only be used under the guidance of a healthcare professional [1][2][3].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.medicalnewstoday.com/articles/248136
[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2493531/