Lipitor, also known as atorvastatin, is a widely prescribed medication used to lower cholesterol levels and reduce the risk of heart disease [1]. According to drugpatentwatch.com, the patent for Lipitor expired in 2011, which means that other pharmaceutical companies can now produce generic versions of the drug [1]. However, the expiration of the patent does not necessarily mean that the drug is no longer effective.

A study published in the Journal of the American College of Cardiology found that atorvastatin was effective in reducing the risk of cardiovascular events in patients with high cholesterol levels [2]. The study also found that atorvastatin was generally well-tolerated and had a low incidence of adverse side effects [2].

Another study published in the journal Atherosclerosis showed that atorvastatin was effective in reducing the progression of atherosclerosis, a condition in which plaque builds up in the arteries and can lead to heart disease [3]. The study found that atorvastatin reduced the progression of atherosclerosis by 37% compared to placebo [3].

In conclusion, while the patent for Lipitor has expired, the drug is still effective in reducing cholesterol levels and lowering the risk of heart disease. Studies have shown that atorvastatin is generally well-tolerated and has a low incidence of adverse side effects. However, as with any medication, it is important to consult with a healthcare provider to determine if atorvastatin is the right treatment option for you.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5514478/
[3] https://pubmed.ncbi.nlm.nih.gov/16513898/