According to the provided sources, Lipitor (atorvastatin calcium) is a medication used to treat high cholesterol levels and reduce the risk of heart attack and stroke. It belongs to a class of drugs called statins, which work by blocking the enzyme responsible for producing cholesterol in the liver.

The recommended starting dose of Lipitor is typically 10 or 20 mg once daily, with the maximum dose being 80 mg once daily [3]. However, it is important to note that the appropriate dosage may vary depending on individual patient factors such as age, gender, and medical history.

While the sources do not provide information about a specific dosage change for Lipitor, they do mention that the FDA has approved several dosage strengths for the drug, including 10 mg, 20 mg, 40 mg, and 80 mg tablets [2]. It is possible that dosage changes may be made on a case-by-case basis by a healthcare provider, based on the patient's response to treatment and any potential side effects.

In summary, while the provided sources do not provide specific information about a dosage change for Lipitor, they do mention the recommended starting and maximum doses, as well as the FDA-approved dosage strengths for the drug. It is important for patients to follow their healthcare provider's instructions regarding the appropriate dosage of Lipitor for their individual needs.

Sources:
[2] FDA label for Lipitor: https://www.accessdata.fda.gov/drugsatfda_docs/label/2009/020702s057lbl.pdf
[3] Healthline article on Lipitor: https://www.healthline.com/health/drugs/lipitor
[4] DrugPatentWatch page on Lipitor: https://www.drugpatentwatch.com/p/tradename/LIPITOR