Lipitor, which contains atorvastatin as its active ingredient, is a medication used to lower cholesterol levels in the blood. According to the sources provided, there is no evidence to suggest that Lipitor has any direct effect on herbs. However, it is important to note that herbs and supplements may interact with Lipitor and potentially affect its effectiveness or cause adverse side effects.

The NHS warns that certain herbs and supplements, such as St John's Wort, may reduce the effectiveness of Lipitor. Additionally, the combination of Lipitor and certain herbs or supplements, such as red yeast rice, may increase the risk of muscle damage and liver problems. Therefore, it is recommended to consult with a healthcare professional before taking any herbal supplements while on Lipitor.

The Drug Patent Watch website provides information on the patent status of Lipitor and its generic equivalents, but does not provide any information on the interaction between Lipitor and herbs.

In summary, there is no evidence to suggest that Lipitor has a direct effect on herbs. However, certain herbs and supplements may interact with Lipitor and potentially affect its effectiveness or cause adverse side effects. It is important to consult with a healthcare professional before taking any herbal supplements while on Lipitor.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4593660/
[3] https://www.nhs.uk/medicines/atorvastatin/taking-atorvastatin-with-other-medicines-and-herbal-supplements/