Lipitor is a medication used to lower cholesterol levels in the blood, and it is typically taken for an extended period of time to maintain cholesterol levels [1]. The duration of treatment with Lipitor should be determined by a healthcare professional based on the patient's individual needs and response to treatment.

Vitamin D is a nutrient that helps the body absorb calcium and maintain healthy bones [3]. The duration of treatment with vitamin D depends on the patient's individual needs and the reason for taking the supplement. According to the Mayo Clinic, vitamin D supplements may be recommended for people who are deficient in vitamin D or at risk of deficiency, such as older adults, people with dark skin, and people who do not get enough sun exposure [3].

It is important to note that the sources provided do not provide specific recommendations on how long Lipitor or vitamin D should be taken. Therefore, it is important to consult with a healthcare professional to determine the appropriate duration of treatment for each individual patient.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://pubmed.ncbi.nlm.nih.gov/18754003/
[3] https://www.mayoclinic.org/drugs-supplements-vitamin-d/art-20363792