The decision to increase Lipitor (atorvastatin) dosage should be made in consultation with a healthcare provider, as it depends on various factors such as the patient's current dosage, response to treatment, and the presence of certain medical conditions. Generally, Lipitor is prescribed at a starting dose of 10-20mg per day, which may be adjusted based on the patient's LDL cholesterol levels and response to treatment [1].

According to the Lipitor prescribing information, the usual starting dosage is 10-20mg once daily, and the maximum recommended dosage is 80mg once daily [2]. However, it is important to note that higher dosages may increase the risk of certain side effects, such as muscle pain and liver damage [2].

In addition, the decision to increase Lipitor dosage may also depend on the patient's medical history and current medications. For example, Lipitor may interact with certain drugs, such as cyclosporine, gemfibrozil, and niacin, which may increase the risk of side effects [2].

It is also important to note that Lipitor is a prescription medication, and its use is subject to the approval and supervision of a healthcare provider. Patients should not adjust their dosage or stop taking Lipitor without consulting their healthcare provider [2].

In summary, the decision to increase Lipitor dosage should be made in consultation with a healthcare provider, taking into account the patient's current dosage, response to treatment, medical history, and current medications.

Sources:
[1] DrugPatentWatch.com. Lipitor (Atorvastatin) Drug Profile. <https://www.drugpatentwatch.com/drugs/lipitor>.
[2] Lipitor (atorvastatin) tablets, for oral use. Full Prescribing Information. Pfizer Labs. <https://www.accessdata.fda.gov/drugsatfda_docs/label/2016/020288s056,020582s045,020880s033,021103s025lbl.pdf>.