Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels in the blood. According to the sources provided, it is possible to increase the dosage of Lipitor after adjustment.

The first source, Drug Patent Watch [1], provides information on the patent status of Lipitor and does not directly address the question. However, the second source, Medscape [2], states that the recommended starting dose of Lipitor is 10-20 mg once daily, and the maximum dose is 80 mg once daily. The dosage can be adjusted based on individual patient response and tolerance. The third source, American Family Physician [3], also mentions that the initial dose of Lipitor is 10-20 mg daily, and the dose can be increased every 4 weeks to a maximum of 80 mg daily.

It is important to note that increasing the dosage of Lipitor should only be done under the guidance of a healthcare professional. The dosage adjustment should be based on the patient's response to the medication and any potential side effects. Additionally, Lipitor may interact with other medications, so it is important to inform the healthcare provider of any other medications the patient is taking.

In conclusion, based on the sources provided, it is possible to increase the dosage of Lipitor after adjustment. However, any dosage adjustment should be made under the guidance of a healthcare professional and should be based on the patient's response to the medication and any potential side effects.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://reference.medscape.com/drug/lipitor-atorvaliq-atorvastatin-342446
[3] https://www.aafp.org/pubs/afp/issues/2007/0515/p1487.html