Lipitor is a brand name for the drug atorvastatin, which is used to treat high cholesterol and reduce the risk of heart disease [2]. It belongs to a class of drugs called statins, which work by blocking the production of cholesterol in the liver [2].

The dosage of Lipitor varies depending on the patient's medical condition, age, and other factors. According to Healthline, the typical starting dose for adults is 10-20 mg once daily, and the maximum dose is 80 mg once daily [2]. The dosage may be adjusted based on the patient's response to the treatment and their risk of heart disease [2].

Medscape notes that the recommended dosage for patients with high cholesterol is usually 10-20 mg once daily, while the recommended dosage for patients with coronary heart disease is usually 80 mg once daily [3]. However, the dosage may be adjusted based on the patient's age, kidney function, and other medical conditions [3].

According to Drug Patent Watch, Lipitor is also used to reduce the risk of stroke and heart attack in patients with type 2 diabetes and high cholesterol [1]. The dosage for this indication is typically 80 mg once daily [1].

In summary, Lipitor is used to treat high cholesterol and reduce the risk of heart disease, stroke, and heart attack in patients with type 2 diabetes and high cholesterol. The dosage varies depending on the patient's medical condition, age, and other factors, but typically ranges from 10-80 mg once daily. It is important to follow the dosage instructions provided by a healthcare professional and to report any side effects or concerns.

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