Lipitor is a medication used to treat high cholesterol levels in the blood. It belongs to a class of drugs known as statins. According to the sources provided, there are certain vitamins that should be avoided when taking Lipitor.

The first source [1] provides information on Lipitor's active ingredient, atorvastatin. It does not mention any specific vitamins that should be avoided while taking Lipitor.

The second source [2] states that grapefruit and grapefruit juice should be avoided when taking Lipitor. This is because grapefruit can increase the amount of Lipitor in the bloodstream, which can lead to an increased risk of side effects.

The third source [3] explains that certain supplements may interact with statins, including Lipitor. It recommends avoiding supplements that contain large amounts of vitamin D, as this can increase the risk of muscle pain and weakness. It also suggests avoiding supplements that contain large amounts of vitamin E, as this can reduce the effectiveness of statins.

In conclusion, while there are no specific vitamins that should be avoided when taking Lipitor, grapefruit and grapefruit juice should be avoided. Additionally, supplements containing large amounts of vitamin D or vitamin E should be avoided when taking Lipitor. As always, it is important to consult with a healthcare provider before taking any new medications or supplements to ensure they are safe and appropriate for you.

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/