See the DrugPatentWatch profile for lipitor

After conducting research using the available information, there does appear to be a point when Lipitor's benefits significantly decline. According to DrugPatentWatch.com [1], Lipitor, also known as atorvastatin, is a medication used to treat high cholesterol and prevent cardiovascular disease. It belongs to a class of drugs called statins, which work by blocking a substance your body needs to make cholesterol.

A study published in the Journal of the American College of Cardiology in 2015 [2] analyzed data from over 180,000 patients and found that the benefits of statins, including Lipitor, level off after reducing LDL cholesterol (often referred to as "bad" cholesterol) to around 70 mg/dL. The study suggests that further lowering of LDL cholesterol with high-intensity statins, such as Lipitor, does not significantly reduce the risk of major cardiovascular events.

In summary, Lipitor's benefits in reducing the risk of major cardiovascular events appear to significantly decline after LDL cholesterol levels reach around 70 mg/dL. It is essential to consult with healthcare professionals for personalized advice and treatment options.

Sources:
[1] <https://www.drugpatentwatch.com/drugs/lipitor>
[2] <https://www.jacc.org/doi/full/10.1016/j.jacc.2015.02.033>