Lipitor (atorvastatin) is a medication used to lower cholesterol levels in the blood. According to Drug Patent Watch [1], Lipitor is a prescription medication that belongs to the class of drugs known as statins. Statins work by inhibiting the enzyme HMG-CoA reductase, which is involved in the production of cholesterol in the liver.

There are several vitamin supplements that are commonly used by people who take Lipitor. However, it is important to note that some vitamin supplements can interact negatively with Lipitor and other statins. According to SingleCare [2], grapefruit and grapefruit juice can interact with Lipitor and increase the risk of side effects such as muscle pain and liver damage. In addition, vitamin D supplements can also interact with Lipitor and increase the risk of muscle pain and weakness.

ConsumerLab [3] recommends avoiding certain supplements when taking statins, including red yeast rice, which contains a natural statin, and CoQ10, which is sometimes used to alleviate muscle pain associated with statin use. The reason for avoiding these supplements is that they can interact with statins and increase the risk of side effects.

In conclusion, it is important to be aware of potential interactions between Lipitor and vitamin supplements. Grapefruit and grapefruit juice, as well as vitamin D supplements, can interact negatively with Lipitor and increase the risk of side effects. Additionally, certain supplements such as red yeast rice and CoQ10 should be avoided when taking statins. It is always recommended to speak with a healthcare provider before starting any new medication or supplement regimen.

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