Lipitor is a medication that is used to lower cholesterol levels in the body. The reason for lowering the dosage of Lipitor is to reduce the risk of side effects associated with higher doses of the medication [2]. The recommended dosage of Lipitor depends on the patient's medical condition, age, and other factors. The initial dose of Lipitor is usually 10 to 20 mg once daily, which can be increased to a maximum of 80 mg per day [3]. However, the dosage may be lowered in certain situations, such as when the patient experiences side effects or has a history of liver disease. Lowering the dosage of Lipitor can also be beneficial for patients who are taking other medications that interact with Lipitor, as this can reduce the risk of drug interactions [2]. It is important to consult with a healthcare provider before adjusting the dosage of Lipitor or any other medication.

Sources:
[2] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[3] https://www.drugs.com/dosage/lipitor.html
[4] https://www.healthline.com/health/drugs/lipitor-dosage