Lipitor (atorvastatin) is a medication used to lower cholesterol levels in the blood. The recommended dosage of Lipitor depends on various factors, including the patient's age, medical history, and other medications they may be taking.

According to Drug Patent Watch [1], the recommended starting dose of Lipitor is typically 10 mg or 20 mg once daily. The dosage may be increased up to 80 mg once daily in some cases. However, the maximum recommended dose is 20 mg for patients with certain medical conditions, such as severe kidney disease or liver disease.

Medscape [2] notes that the dosage of Lipitor should be individualized based on the patient's response and tolerance to the medication. Patients should be monitored regularly to assess their lipid levels and any potential side effects.

A study published in the Journal of the American Heart Association [3] suggests that lower doses of atorvastatin may be just as effective as higher doses for some patients. The study found that a daily dose of 10 mg of atorvastatin was just as effective as a daily dose of 80 mg for reducing the risk of cardiovascular events in patients with stable coronary heart disease.

In conclusion, the recommended dosage of Lipitor varies depending on the patient's individual needs and medical history. The starting dose is typically 10 mg or 20 mg once daily, and the dosage may be increased up to 80 mg once daily in some cases. However, the maximum recommended dose is 20 mg for patients with certain medical conditions. Patients should be monitored regularly to assess their response to the medication and any potential side effects.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://reference.medscape.com/drug/lipitor-atorvaliq-atorvastatin-342446
[3] https://pubmed.ncbi.nlm.nih.gov/28357715/