Lipitor is a medication used to treat high cholesterol levels in the blood. While taking Lipitor, it is essential to monitor the levels of certain vitamins in the body. According to the sources provided [1][2][3], the vitamins that should be monitored while taking Lipitor are Vitamin D, Vitamin B12, and Coenzyme Q10.

Vitamin D is essential for bone health, and it helps the body absorb calcium. Lipitor can lower the levels of Vitamin D in the body, which can lead to bone loss, muscle weakness, and an increased risk of falls. Therefore, it is recommended to monitor the levels of Vitamin D in the body while taking Lipitor [2][3].

Vitamin B12 is essential for the production of red blood cells and the proper functioning of the nervous system. Lipitor can interfere with the absorption of Vitamin B12, leading to a deficiency. Symptoms of Vitamin B12 deficiency include fatigue, weakness, numbness, and tingling in the hands and feet. It is recommended to monitor the levels of Vitamin B12 in the body while taking Lipitor [2][3].

Coenzyme Q10 is an antioxidant that plays a vital role in energy production in the body. Lipitor can lower the levels of Coenzyme Q10 in the body, which can lead to muscle pain and weakness. Therefore, it is recommended to monitor the levels of Coenzyme Q10 in the body while taking Lipitor [1][3].

In conclusion, while taking Lipitor, it is recommended to monitor the levels of Vitamin D, Vitamin B12, and Coenzyme Q10 in the body. This will help to prevent deficiencies and ensure that the medication is working effectively. It is essential to consult a healthcare provider before making any changes to your medication or vitamin regimen.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.singlecare.com/blog/atorvastatin-interactions/
[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3942300/