Lipitor is a medication that contains atorvastatin and is used to treat high cholesterol levels. According to the sources provided, the dosage of Lipitor should be adjusted based on individual patient needs and response to treatment. The recommended starting dose of Lipitor is usually 10-20 mg per day, and it can be increased to a maximum of 80 mg per day if needed [3]. However, the decision to increase the dosage should be made by a healthcare professional based on the patient's lipid levels and overall health status.

The patent for Lipitor expired in 2011, and since then, several generic versions of atorvastatin have become available [1]. It is important to note that different brands of atorvastatin may have different dosing recommendations, and patients should always follow the instructions provided by their healthcare provider or pharmacist.

A study published in the Journal of Clinical Lipidology found that increasing the dosage of atorvastatin from 10 mg to 80 mg per day resulted in a significant reduction in LDL cholesterol levels [2]. However, the study also noted that higher doses of atorvastatin were associated with an increased risk of side effects, such as muscle pain and liver problems. Therefore, healthcare providers should carefully monitor patients who are taking high doses of atorvastatin.

In summary, the dosage of Lipitor should be individualized based on the patient's needs and response to treatment. The recommended starting dose is usually 10-20 mg per day, and the maximum dose is 80 mg per day. Patients should always follow the instructions provided by their healthcare provider or pharmacist, and healthcare providers should carefully monitor patients who are taking high doses of atorvastatin.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4354082/
[3] https://www.mayoclinic.org/drugs-supplements/atorvastatin-oral-route/proper-use/drg-20067003