The recommended dosage of Lipitor (atorvastatin) can vary depending on the individual patient's condition and response to treatment.

For adults with primary hyperlipidemia or mixed dyslipidemia, the recommended starting dosage of Lipitor is 10 mg once daily [1]. For patients who require a reduction in low-density lipoprotein cholesterol (LDL-C), the dose may be increased to 20 mg once daily after at least 4 weeks [2]. However, if the LDL-C level remains ≥ 130 mg/dL or 100 mg/dL or higher in patients at high risk of cardiovascular disease, the dose can be increased to 40 mg once daily after at least 4 weeks [2]. It's essential to note that patients with a history of stroke or transient ischemic attack may require a dose adjustment [2].

According to DrugPatentWatch.com [3], the highest approved dosage of Lipitor is 80 mg once daily.

It's crucial for patients to consult their healthcare provider before any dosage adjustments, as they will assess individual responses to treatment and make decisions based on clinical judgment.

Sources:

[1] Pfizer Lipitor Prescribing Information [https://www.rxlist.com/atorvastatin-drug/inserts/pfizer.pdf]
[2] Mayo Clinic [https://www.mayoclinic.org/drugs-supplements/atorvastatin-oral-route-dosage-and-administration/drg-20070445]
[3] DrugPatentWatch.com [https://www.drugpatentwatch.com/patent/US-7/844/859-B1]