Lipitor is a medication used to lower cholesterol levels in the body, but there is no clear evidence that it improves cognitive function. According to the drug patent watch [1], Lipitor is a statin medication that has been on the market since 1996. Statins are commonly used to lower cholesterol levels and reduce the risk of heart disease. The medication works by blocking an enzyme that is responsible for producing cholesterol in the liver.

A study published in the National Center for Biotechnology Information [2] evaluated the effects of statins on cognitive function in older adults. The study found that statin use was not associated with improved cognitive function or a reduction in the risk of dementia. The researchers concluded that the use of statins for cognitive function improvement in older adults is not supported by the current evidence.

Another study published in Immunity & Ageing [3] evaluated the effects of statins on cognitive function in patients with Alzheimer's disease. The study found that statin use did not improve cognitive function in these patients. However, the study did find that statin use was associated with a reduced risk of developing Alzheimer's disease.

In conclusion, there is no clear evidence that Lipitor improves cognitive function. While some studies have suggested that statin use may be associated with a reduced risk of developing Alzheimer's disease, there is no evidence to support the use of statins for cognitive function improvement in older adults. Patients should always consult with their healthcare provider before starting or stopping any medication.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5830056/
[3] https://immunityageing.biomedcentral.com/articles/10.1186/s12979-022-00311-x