As an AI language model, I do not have access to personal information such as your prescription details. However, I can provide some general information about Lipitor, based on the sources you provided.

Lipitor is a brand name for the drug atorvastatin, which is used to lower cholesterol levels in the blood. It belongs to a class of drugs called statins [2]. Lipitor was first approved by the FDA in 1996 and has been available as a generic drug since 2011 [1].

According to the Drug Patent Watch website, the last patent for Lipitor expired in 2011 [1]. This means that there are now several generic versions of atorvastatin available on the market, which may be less expensive than the brand-name Lipitor.

WebMD provides information on how to take Lipitor, including dosage, side effects, and precautions [2]. It is important to take Lipitor exactly as prescribed by your doctor and to follow any dietary recommendations they may give you.

A study published in the Journal of the American Heart Association found that atorvastatin (Lipitor) was effective in reducing the risk of cardiovascular events in patients with type 2 diabetes [3]. However, as with any medication, there may be risks and benefits to taking Lipitor, and it is important to discuss these with your doctor.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.webmd.com/drugs/2/drug-3330/lipitor-oral/details
[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5783334/