Atorvastatin, commonly known as Lipitor, is a medication used to lower cholesterol levels in the blood. According to the sources provided, there are no specific herbs that are known to interact negatively with Lipitor. However, it is recommended to consult with a healthcare professional before taking any herbal supplements while on Lipitor or any other medication.

The NHS website advises that grapefruit juice should be avoided when taking Lipitor as it can increase the levels of the drug in the blood, leading to an increased risk of side effects. Additionally, St. John's Wort, a herbal supplement commonly used to treat depression, can reduce the effectiveness of Lipitor and should be avoided.

ConsumerLab also recommends avoiding large amounts of green tea and ginkgo biloba while taking Lipitor as they can increase the risk of bleeding, especially when taken in combination with other blood-thinning medications.

In conclusion, while there are no specific herbs that should be avoided when taking Lipitor, it is important to consult with a healthcare professional before taking any herbal supplements. Grapefruit juice, St. John's Wort, green tea, and ginkgo biloba are known to interact with Lipitor and should be avoided or used with caution.

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/