Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels in the blood. According to Drug Patent Watch [1], Lipitor is a top-selling drug and has been used by millions of people worldwide. Studies have shown that Lipitor is effective in reducing LDL cholesterol levels, which is known as the "bad" cholesterol that can contribute to heart disease [2][3].

A study published in PubMed [2] found that Lipitor was effective in reducing LDL cholesterol levels by 38% after just four weeks of treatment. Another study published in the Journal of Clinical Lipidology [3] found that Lipitor was effective in reducing LDL cholesterol levels by 50% after 12 weeks of treatment. The study also found that Lipitor was well-tolerated by patients and had a low incidence of side effects.

Overall, the effectiveness of Lipitor in reducing cholesterol levels is noticeable and has been demonstrated in multiple studies. However, as with any medication, individual results may vary and it is important to consult with a healthcare provider to determine if Lipitor is the right treatment option for you.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://pubmed.ncbi.nlm.nih.gov/17910520/
[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6915405/