Lipitor is a brand name for the drug atorvastatin, which is a medication used to lower cholesterol levels in the blood. According to the drug patent watch [1], Lipitor's patent expired in 2011, which means that it is now available in generic form. A study published in the Journal of Diabetes Research and Clinical Metabolism [2] found that atorvastatin was effective in reducing LDL cholesterol levels in patients with type 2 diabetes. The study also found that atorvastatin was well-tolerated and did not have any significant side effects. Another study published in the Journal of Atherosclerosis and Thrombosis [3] found that atorvastatin was effective in reducing the risk of cardiovascular events in patients with type 2 diabetes. The study concluded that atorvastatin should be considered as a first-line therapy for the prevention of cardiovascular events in diabetic patients. In conclusion, based on the sources provided, Lipitor (atorvastatin) is an effective medication for reducing cholesterol levels and preventing cardiovascular events in patients with type 2 diabetes.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7369709/
[3] https://pubmed.ncbi.nlm.nih.gov/23476802/