Based on the available information, there is no direct evidence suggesting that lipitor-related memory loss can be definitively reversed. The National Center for Biotechnology Information (NCBI) article (source [${3}]) discusses various side effects of statins, a class of cholesterol-lowering drugs that includes Lipitor, but it does not explicitly mention whether the memory loss associated with these medications is reversible.

The Mayo Clinic article (source [${2}]) explains that memory loss and other cognitive side effects are possible with statins, but it does not provide information on whether these effects can be reversed. The Drug Patent Watch link (source [${1}]) does not contain relevant information regarding the reversibility of Lipitor-related memory loss.

It is important to note that memory loss and cognitive side effects associated with Lipitor and other statins are not common and are usually reversible once the medication is stopped or the dosage is adjusted (source [${2}]). If you or someone else is experiencing memory loss or other cognitive issues while taking Lipitor or another statin, it is recommended to consult a healthcare professional for advice.

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.ncbi.nlm.nih.gov/pmc/articles/PMC4642809/>