Lipitor, a medication commonly used to treat high cholesterol, is typically prescribed based on a patient's individual needs and medical history, not solely on their dietary habits such as high fat intake. The dosage is usually determined by the patient's health condition, age, response to treatment, and potential interactions with other medications [1].

However, it's important to note that diet plays a significant role in managing cholesterol levels. A diet high in saturated fats can increase cholesterol levels, potentially reducing the effectiveness of Lipitor or other statin medications [2]. Therefore, even if a patient is on Lipitor, they should still aim to follow a heart-healthy diet as recommended by their healthcare provider.

As for the dosage, it's typically started at a lower dose and then adjusted based on the patient's response to treatment. The usual starting dose is 10 or 20 mg once daily, and it can be increased up to 80 mg once daily [1].

Remember, this information is general in nature, and individual health situations can vary. Therefore, it's always important to consult with a healthcare provider for personalized medical advice.

Sources:
[1] "Lipitor-atorvastatin Calcium Tablet." National Library of Medicine, pubchem.ncbi.nlm.nih.gov/compound/Lipitor.
[2] "How to Lower Cholesterol." Mayo Clinic, www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/in-depth/lower-cholesterol/art-20045935.
[3] "Lipitor (Atorvastatin Calcium) Tablets, for Oral Use." DailyMed, drugs.nlm.nih.gov/druginfo/dailymed/label.jsp?labelid=11158.
[4] "Atorvastatin." DrugPatentWatch, drugpatentwatch.com/drugs/atorvastatin.