Lipitor (atorvastatin) is a medication used to lower cholesterol levels in the blood. Vitamin D is an essential nutrient that helps the body absorb calcium and maintain healthy bones. While there are no known interactions between Lipitor and vitamin D, there may be potential side effects when taking both medications together.

One study published in the QJM: An International Journal of Medicine found that taking atorvastatin with vitamin D supplements can increase the risk of muscle damage, a known side effect of statins [3]. Another study published in the Journal of Clinical Lipidology found that taking high doses of vitamin D supplements with atorvastatin may increase the risk of developing kidney problems [2].

It is important to note that these studies were conducted on a limited sample size and more research is needed to determine the exact effects of combining Lipitor and vitamin D. Patients who are taking Lipitor and vitamin D supplements should speak with their healthcare provider to monitor for potential side effects and to ensure they are taking the appropriate doses of both medications.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://pubmed.ncbi.nlm.nih.gov/18754003/
[3] https://academic.oup.com/qjmed/article/105/5/487/1565780