Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels in the blood. The dosage of Lipitor depends on various factors such as age, gender, medical history, and the severity of the condition.

According to Drugs.com [2], the recommended starting dose for most adults is 10-20 mg once daily. However, the dose may be increased up to 80 mg per day, depending on the patient's response and the treating physician's discretion. The dosage should be individualized and adjusted based on the patient's lipid levels and response to treatment.

Medscape [3] provides additional information on Lipitor dosing for specific patient populations. For example, for patients with homozygous familial hypercholesterolemia, the recommended dose is 10-80 mg daily. For patients with renal impairment, the dose should be adjusted based on the patient's estimated glomerular filtration rate (eGFR).

It is important to note that Lipitor should be taken as directed by a healthcare provider. Patients should not adjust their dose or stop taking the medication without consulting their physician. Additionally, patients should inform their doctor of any other medications they are taking to avoid potential drug interactions.

In conclusion, the dosage of Lipitor varies based on individual patient factors and should be determined by a healthcare provider. The recommended starting dose for most adults is 10-20 mg once daily, but the dose may be increased up to 80 mg per day based on the patient's response and the treating physician's discretion.

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