Lipitor is a medication used to lower cholesterol levels in the body [1]. It is important to know that there are certain herbal supplements that should be avoided while taking Lipitor. According to the NHS, St John's Wort, a herbal remedy used to treat depression, anxiety and sleep disorders, can reduce the effectiveness of Lipitor [2]. Additionally, the ConsumerLab website states that red yeast rice, a supplement used to lower cholesterol levels, should also be avoided while taking Lipitor as it can increase the risk of side effects [3]. It is important to speak with a healthcare professional before taking any herbal supplements while on Lipitor to avoid any potential interactions.

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/