After reviewing the sources, there is no evidence to suggest that the dosage of Lipitor is dependent on herb use.

Lipitor is a brand-name medication containing the active ingredient atorvastatin, which is used to lower cholesterol levels in the blood. According to Drug Patent Watch [1], Lipitor is available in several dosages ranging from 10mg to 80mg. However, there is no mention of herb use affecting the dosage of Lipitor.

A study published in the Journal of Traditional and Complementary Medicine [2] explored the potential interaction between atorvastatin and herbs commonly used in traditional Chinese medicine. The study found that certain herbs may interact with atorvastatin, but the authors did not discuss any impact on dosage.

Another study published in the Journal of Clinical Pharmacology [3] investigated the effect of St. John's Wort on atorvastatin levels in the body. The study concluded that St. John's Wort may decrease the effectiveness of atorvastatin, but again, there was no mention of dosage changes.

In summary, there is no evidence to suggest that the dosage of Lipitor is dependent on herb use. However, it is important to consult with a healthcare provider before taking any herbs or supplements while on Lipitor to ensure there are no potential interactions or adverse effects.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5822686/
[3] https://pubmed.ncbi.nlm.nih.gov/22703874/