When taking Lipitor, a medication used to treat high cholesterol, there are certain supplements that you may want to avoid due to potential interactions. However, it is essential to consult with your healthcare provider before starting or stopping any medications or supplements. Here are some supplements that you might want to avoid while taking Lipitor, based on the information available:

1. Red Yeast Rice: This supplement contains monacolin K, a compound similar to the active ingredient in Lipitor. Combining the two may increase the risk of side effects, such as muscle damage [1].

2. Coenzyme Q10 (CoQ10): Lipitor and other statins can deplete the body's levels of CoQ10, which is essential for cellular energy production. While CoQ10 supplementation may help alleviate muscle-related side effects of Lipitor, it could potentially reduce the drug's effectiveness [2].

3. Garlic: Garlic supplements may also interact with Lipitor and other statins, potentially increasing the risk of side effects such as muscle damage and liver enzyme abnormalities [3].

4. St. John's Wort: This herbal supplement can affect the metabolism of various medications, including Lipitor, potentially leading to reduced drug effectiveness or increased side effects [4].

5. Grapefruit Juice: Consuming grapefruit juice while taking Lipitor can increase the concentration of the drug in the bloodstream, potentially leading to an increased risk of side effects [5].

Sources:

1. DrugPatentWatch.com. (n.d.). Red Yeast Rice. Retrieved from https://www.drugpatentwatch.com/drug/red_yeast_rice
2. DrugPatentWatch.com. (n.d.). Coenzyme Q10. Retrieved from https://www.drugpatentwatch.com/drug/coenzyme_q10
3. DrugPatentWatch.com. (n.d.). Garlic. Retrieved from https://www.drugpatentwatch.com/drug/garlic
4. DrugPatentWatch.com. (n.d.). St. John's Wort. Retrieved from https://www.drugpatentwatch.com/drug/st._john's_wort
5. DrugPatentWatch.com. (n.d.). Grapefruit Juice. Retrieved from https://www.drugpatentwatch.com/drug/grapefruit_juice