Lipitor is a medication used to lower cholesterol levels in the body. The dosage of Lipitor may need to be changed for several reasons. One reason may be due to the patient's response to the medication. If the patient's cholesterol levels are not adequately controlled, the dosage may need to be increased. Conversely, if the patient experiences side effects from the medication, the dosage may need to be decreased or discontinued altogether [3].

Another reason for a change in Lipitor dosage may be due to drug interactions. Certain medications can interact with Lipitor, potentially increasing the risk of side effects or reducing the effectiveness of the medication. In such cases, the dosage of Lipitor may need to be adjusted to ensure safe and effective treatment [2].

It is important to note that the dosage of Lipitor should always be determined by a healthcare provider. The recommended starting dose of Lipitor is typically 10-20 mg per day, with adjustments made based on the patient's response to the medication and other individual factors [1].

In conclusion, the dosage of Lipitor may need to be changed due to the patient's response to the medication, drug interactions, or other individual factors. It is important to consult with a healthcare provider to determine the appropriate dosage of Lipitor for each patient's unique needs.

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