Lipitor is a medication used to lower cholesterol levels in the blood, and it is generally safe to take supplements while taking Lipitor. However, some supplements can interact with Lipitor and affect its effectiveness or cause side effects. According to ConsumerLab [2], some supplements that should be avoided when taking statins, including Lipitor, are red yeast rice, grapefruit juice, and St. John's Wort. Red yeast rice contains a substance that is similar to the active ingredient in Lipitor, and taking both together can increase the risk of side effects. Grapefruit juice can increase the level of Lipitor in the blood, which can increase the risk of side effects. St. John's Wort can decrease the effectiveness of Lipitor and increase the risk of side effects. SingleCare [3] also warns that taking supplements such as niacin, vitamin D, and fish oil with Lipitor can increase the risk of muscle damage. Therefore, it is essential to consult with a healthcare provider before taking any supplements while taking Lipitor to avoid potential interactions and side effects.

Sources:
[2] https://www.consumerlab.com/answers/which-drugs-should-be-avoided-when-taking-statins/statin-supplement-interactions/
[3] https://www.singlecare.com/blog/atorvastatin-interactions/
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR