Lipitor is a brand name for the medication atorvastatin, which is a prescription drug used to lower cholesterol levels and prevent heart disease. According to the sources provided, the dosage of Lipitor should be adjusted based on individual patient needs and medical history.

The first source [1] provides information on the patent status of Lipitor and does not provide specific information on dosage adjustments. The second source [2] provides general dosing guidelines for Lipitor, stating that the recommended starting dose is 10 or 20 mg once daily, and the maximum dose is 80 mg once daily. However, the dosage may be adjusted based on individual patient response and tolerance, as well as other medical conditions and medications the patient may be taking.

The third source [3] provides more detailed information on when to adjust Lipitor dosage. According to this source, the dosage of Lipitor should be adjusted based on the patient's LDL cholesterol levels. The recommended goal for LDL cholesterol levels varies based on the patient's risk factors for heart disease, but in general, the goal is to lower LDL cholesterol levels by at least 50%. If the patient's LDL cholesterol levels are not at the desired level after 4 weeks of treatment, the dosage of Lipitor may be increased. Conversely, if the patient experiences side effects from Lipitor, the dosage may need to be decreased or the medication may need to be discontinued.

In summary, the dosage of Lipitor should be adjusted based on individual patient needs and medical history, including LDL cholesterol levels and tolerance to the medication. Patients should work closely with their healthcare provider to determine the appropriate dosage of Lipitor for their specific situation.

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