Lipitor (atorvastatin) is a medication that is commonly used to lower cholesterol levels in the body. It is important to note that there are some herbal supplements that may interact with Lipitor, potentially leading to adverse effects.

According to the National Health Service (NHS) [3], it is recommended to avoid taking St. John's Wort, a herbal supplement used to treat depression, while taking Lipitor. St. John's Wort can increase the breakdown of Lipitor in the body, which can reduce its effectiveness. Additionally, the NHS recommends avoiding grapefruit juice while taking Lipitor, as it can increase the levels of the medication in the body, potentially leading to side effects.

A study published in the Journal of Pharmacy Practice [2] also identified several herbal supplements that may interact with Lipitor. These include echinacea, ginkgo biloba, and garlic supplements. Echinacea and ginkgo biloba can increase the risk of bleeding when taken with Lipitor, while garlic supplements can increase the risk of muscle damage.

It is important to note that these are not the only herbal supplements that may interact with Lipitor. Patients should always inform their healthcare provider of any supplements they are taking, as well as any other medications, to ensure that there are no potential interactions.

Sources:
[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/
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR