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When it comes to prescribing Lipitor (atorvastatin) for patients with kidney issues, the dosage can depend on the severity of the kidney disease. According to the official Lipitor Prescribing Information, a lower starting dose may be considered in patients with moderate to severe renal impairment [1]. However, it is important to note that the specific dosage adjustments can vary based on the individual patient's condition and the prescribing physician's discretion.

In general, for patients with mild renal impairment, the usual starting dose of Lipitor (10-20 mg per day) may be used. For those with moderate renal impairment (creatinine clearance 30-59 mL/min), a starting dose of 10 mg per day is often recommended. For patients with severe renal impairment (creatinine clearance <30 mL/min), a starting dose of 10 mg every other day is typically suggested [1].

It is crucial for healthcare providers to closely monitor kidney function and lipid levels in patients taking Lipitor, especially those with renal impairment. Adjustments to the dosage may be necessary based on the patient's response to treatment and any changes in their kidney function.

In summary, the appropriate Lipitor dose for kidney patients depends on the severity of their kidney disease, and healthcare providers should carefully consider the patient's individual needs when prescribing this medication.

Sources:
[1] Lipitor (atorvastatin) Prescribing Information. Pfizer Labs. April 2021. <https://www.accessdata.fda.gov/drugsatfda_docs/label/2021/020970s091,021068s011lbl.pdf>
[2] DrugPatentWatch.com. Atorvastatin (Lipitor) Patent Expiration and Generic Entry. <https://www.drugpatentwatch.com/patent/atorvastatin-lipitor/>