Lipitor is a medication used to lower cholesterol levels in the blood. The recommended dosage of Lipitor depends on the patient's age, medical history, and other factors. According to Drugs.com [2], the recommended starting dose for most adults is 10-20 mg once daily, taken at any time of day, with or without food. The maximum dose is 80 mg per day. The dosage may be adjusted based on the patient's response to treatment and other medical conditions. It is important to take Lipitor regularly and at the same time each day to get the maximum benefit.

Drugpatentwatch.com [1] notes that the patent for Lipitor expired in 2011, which means that generic versions of the drug are available. The dosage instructions for generic versions of Lipitor may vary slightly from the brand-name version, so patients should always follow the instructions provided by their doctor or pharmacist.

Medscape [3] notes that Lipitor should be used with caution in patients with liver disease, and the dosage may need to be adjusted in these patients. Lipitor may also interact with other medications, so patients should inform their doctor of all medications they are taking before starting Lipitor.

In conclusion, the recommended dosage of Lipitor varies depending on the patient's medical history and other factors. Patients should follow the instructions provided by their doctor or pharmacist, and take Lipitor regularly at the same time each day to get the maximum benefit. Lipitor should be used with caution in patients with liver disease and may interact with other medications.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.drugs.com/dosage/lipitor.html
[3] https://reference.medscape.com/drug/lipitor-atorvaliq-atorvastatin-342446