Lipitor is a brand name for the drug atorvastatin, which is used to lower cholesterol levels in the body. According to the sources provided, there are some herbs that should be avoided while taking Lipitor.

The NHS [2] states that St John's Wort, a herbal remedy commonly used to treat depression, anxiety, and sleep disorders, can reduce the effectiveness of Lipitor. This is because St John's Wort can increase the breakdown of Lipitor in the liver, leading to lower levels of the drug in the body.

ConsumerLab [3] also warns against using grapefruit juice or supplements containing grapefruit extract while taking Lipitor. Grapefruit can increase the level of Lipitor in the bloodstream, leading to a higher risk of side effects such as muscle pain and liver damage.

However, DrugPatentWatch [1] does not mention any specific herbs that should be avoided while taking Lipitor.

In summary, while there is no comprehensive list of herbs to avoid while taking Lipitor, it is important to be cautious with St John's Wort and grapefruit products. Patients taking Lipitor should always consult with their healthcare provider before taking any herbal supplements or making any changes to their diet.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.nhs.uk/medicines/atorvastatin/taking-atorvastatin-with-other-medicines-and-herbal-supplements/
[3] https://www.consumerlab.com/answers/which-drugs-should-be-avoided-when-taking-statins/statin-supplement-interactions/