Lipitor (atorvastatin) is a medication that is used to lower cholesterol levels in the blood. According to the sources provided, there is no specific recommendation on how often to monitor your Lipitor dosage when using low-fat substitutes. However, it is important to follow the dosage instructions provided by your healthcare provider and to inform them of any changes in your diet or lifestyle that may affect your medication regimen [3].

Lipitor is typically taken once a day, with or without food, and at the same time each day. The dosage may vary depending on the individual's cholesterol levels and other medical conditions. It is important to take Lipitor as prescribed and not to adjust the dosage without consulting a healthcare provider [2].

When taking Lipitor, it is important to avoid consuming grapefruit or grapefruit juice, as it can increase the risk of side effects. Additionally, low-fat substitutes may not necessarily be effective in reducing cholesterol levels, and it is important to maintain a healthy diet and exercise regimen to manage cholesterol levels [1].

In summary, there is no specific recommendation on how often to monitor your Lipitor dosage when using low-fat substitutes. It is important to follow the dosage instructions provided by your healthcare provider and to inform them of any changes in your diet or lifestyle that may affect your medication regimen. Additionally, it is important to avoid consuming grapefruit or grapefruit juice and to maintain a healthy diet and exercise regimen to manage cholesterol levels.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.goodrx.com/atorvastatin/what-is
[3] https://www.medicalnewstoday.com/articles/atorvastatin-oral-tablet