Lipitor is a brand name for the drug atorvastatin, which is a type of medication used to lower cholesterol levels in the blood. According to Drug Patent Watch [1], atorvastatin was first approved by the FDA in 1996 and has been widely used since then.

While Lipitor is generally considered safe and effective, like all medications, it can have side effects. One of the potential side effects of Lipitor is memory loss. According to the Mayo Clinic [2], some people who take statins, including Lipitor, may experience memory loss or confusion. However, the Mayo Clinic notes that these side effects are rare and typically go away once the medication is stopped.

WebMD [3] also notes that some people who take statins may experience "brain fog," which can include memory problems, difficulty concentrating, and confusion. However, the article notes that the link between statins and brain fog is not well understood and more research is needed to determine if there is a direct cause-and-effect relationship.

In conclusion, while Lipitor can lead to memory loss as a potential side effect, it is a rare occurrence. People who experience memory loss or confusion while taking Lipitor should consult with their doctor to determine if the medication is the cause and to discuss alternative treatment options.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/in-depth/statin-side-effects/art-20046013
[3] https://www.webmd.com/cholesterol-management/features/statins-and-brain-fog