Lipitor is a brand name for atorvastatin, which is a medication used to lower cholesterol levels in the blood. According to the National Health Service (NHS) [2], some herbal supplements can interact with atorvastatin and increase the risk of side effects. For instance, St John's Wort, a herbal supplement used to treat depression, can reduce the effectiveness of atorvastatin. Therefore, it is important to inform your healthcare provider if you are taking any herbal supplements before starting atorvastatin.

Additionally, a study published in the Journal of Pharmacy and Bioallied Sciences [3] suggests that some herbal supplements can interact with atorvastatin and affect its pharmacokinetics. For example, garlic supplements can increase the bioavailability of atorvastatin, leading to potential adverse effects. Similarly, ginger supplements can also increase the bioavailability of atorvastatin, which may lead to increased side effects. Therefore, it is advisable to avoid taking these supplements without consulting a healthcare provider.

In conclusion, some herbal supplements can interact with atorvastatin, which is the active ingredient in Lipitor. St John's Wort, garlic supplements, and ginger supplements are some of the herbal supplements that can interact with atorvastatin. Therefore, it is essential to inform your healthcare provider if you are taking any herbal supplements before starting atorvastatin.

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