Lipitor is a medication used to lower cholesterol levels in the blood, while vitamin D is a vitamin that helps the body absorb calcium and maintain healthy bones. According to the sources provided, it is recommended to consult a doctor before taking Lipitor and vitamin D together.

Lipitor belongs to a class of drugs called statins, which work by blocking an enzyme that the liver needs to produce cholesterol. Statins can cause side effects such as muscle pain and weakness, liver damage, and an increased risk of developing type 2 diabetes [3]. The combination of Lipitor and vitamin D may increase the risk of these side effects, particularly muscle pain and weakness, which can be serious [1].

Vitamin D is essential for maintaining healthy bones and teeth, and it can also help prevent chronic diseases such as osteoporosis, heart disease, and certain types of cancer [2]. However, taking too much vitamin D can be harmful and cause symptoms such as nausea, vomiting, and weakness. It can also lead to high levels of calcium in the blood, which can damage the kidneys and other organs [2].

Therefore, it is important to consult a doctor before taking Lipitor and vitamin D together, as they can interact and cause side effects. The doctor can advise on the appropriate dosage and monitor for any potential side effects [3].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://ods.od.nih.gov/factsheets/VitaminD-Consumer/
[3] https://my.clevelandclinic.org/health/treatments/22282-statins