Lipitor is a medication used to lower cholesterol levels in the blood. The dosage of Lipitor depends on various factors, including the patient's age, sex, medical condition, and other medications they are taking.

According to Healthline [2], the typical starting dose for Lipitor is 10-20 mg once a day. However, the dosage can be adjusted based on the patient's response to the medication. If the patient's cholesterol levels are not adequately controlled, the dosage may be increased up to a maximum of 80 mg once a day.

SingleCare [3] also notes that the dosage of Lipitor may be adjusted based on the patient's age and medical condition. For example, older adults may require a lower dosage due to a higher risk of side effects. Patients with liver or kidney problems may also require a lower dosage.

Drug Patent Watch [1] provides additional information on the dosage of Lipitor. The website notes that the recommended dosage may vary depending on the country and the specific indication for which the medication is being used. For example, in the United States, the recommended dosage for the prevention of cardiovascular disease is 10-80 mg once a day, while the recommended dosage for the treatment of high cholesterol is 10-20 mg once a day.

In conclusion, the dosage of Lipitor is determined based on various factors, including the patient's age, sex, medical condition, and other medications they are taking. The typical starting dose is 10-20 mg once a day, but the dosage may be adjusted based on the patient's response to the medication. Patients should always follow their doctor's instructions regarding the dosage of Lipitor.

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