After reviewing the available information, I found no evidence that suggests memory loss is a common side effect of Lipitor.

Lipitor, also known as atorvastatin, is a medication used to treat high cholesterol and prevent heart disease [1]. The drug's patent information does not mention memory loss as a potential side effect [2].

While it is true that some statins have been associated with cognitive side effects such as memory loss and confusion, these cases are not common and tend to resolve once the medication is stopped or the dosage is adjusted [3]. The Mayo Clinic states that "most people who take statins don't have serious side effects" and that "memory loss or confusion is not common" [3].

WebMD also notes that "some people have reported memory loss and confusion while taking statins, but it's rare" [4]. They suggest that if a person experiences memory loss or confusion while taking a statin, they should talk to their doctor about adjusting the dosage or switching to a different medication.

In summary, while some statins have been associated with memory loss and confusion, these cases are not common and tend to resolve once the medication is stopped or the dosage is adjusted. There is no evidence to suggest that memory loss is a common side effect of Lipitor.

Sources:

* [1] DrugPatentWatch. Lipitor. <https://www.drugpatentwatch.com/p/tradename/LIPITOR>
* [2] DrugPatentWatch. Atorvastatin. <https://www.drugpatentwatch.com/drugs/atorvastatin>
* [3] Mayo Clinic. Statin side effects: Weigh the benefits and risks. <https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/in-depth/statin-side-effects/art-20046013>
* [4] WebMD. Statins and Brain Fog. <https://www.webmd.com/cholesterol-management/features/statins-and-brain-fog>