Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels in the body. The dosage of Lipitor needed to achieve results varies depending on the individual's condition and medical history. It is important to consult with a healthcare provider to determine the appropriate dosage.

According to the Drug Patent Watch [1], the recommended starting dose of Lipitor is typically 10-20 mg per day. The dosage may be increased to a maximum of 80 mg per day for individuals with severe hypercholesterolemia.

A study published in the Journal of the American Heart Association [2] found that a daily dose of 80 mg of atorvastatin was effective in reducing the risk of major cardiovascular events in patients with a history of heart disease. However, the study also noted that the higher dosage may increase the risk of adverse effects such as muscle pain and liver damage.

Another study published in the Journal of Clinical Pharmacology [3] evaluated the effectiveness of different dosages of atorvastatin in reducing LDL cholesterol levels. The study found that a daily dose of 10 mg was effective in reducing LDL cholesterol levels by 34%, while a dose of 80 mg resulted in a 61% reduction.

In summary, the appropriate dosage of Lipitor for results varies depending on the individual's medical history and condition. The recommended starting dose is typically 10-20 mg per day, and the maximum dosage is 80 mg per day. Higher dosages may be effective in reducing cholesterol levels and lowering the risk of cardiovascular events, but may also increase the risk of adverse effects. It is important to consult with a healthcare provider to determine the appropriate dosage.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6464917/
[3] https://pubmed.ncbi.nlm.nih.gov/15883262/