Lipitor is a medication used to lower cholesterol levels in the blood. According to the drug patent watch website [1], the patent for Lipitor expired in 2011, which means that generic versions of the drug are available. The recommended starting dose of Lipitor is 10-20 mg per day, with the maximum dose being 80 mg per day [3]. However, the dose of Lipitor can be increased or decreased depending on the individual's response to the medication and the severity of their condition.

A study published in the US National Library of Medicine National Institutes of Health [2] found that increasing the dose of atorvastatin (the active ingredient in Lipitor) from 10 mg to 80 mg per day resulted in a significant reduction in LDL cholesterol levels. However, the study also found that increasing the dose of atorvastatin was associated with an increased risk of side effects, including muscle pain and liver dysfunction. Therefore, it is important to consult with a healthcare provider before increasing the dose of Lipitor.

The Mayo Clinic website [3] provides instructions on how to take Lipitor, including taking it at the same time every day, with or without food, and not exceeding the recommended dose. It also advises patients to inform their healthcare provider if they experience any side effects while taking Lipitor.

In conclusion, while the maximum dose of Lipitor is 80 mg per day, the dose should only be increased or decreased under the guidance of a healthcare provider. Increasing the dose of Lipitor can result in a significant reduction in LDL cholesterol levels, but it can also increase the risk of side effects. Patients should follow the instructions provided by their healthcare provider and inform them of any side effects experienced while taking Lipitor.

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