According to the sources provided, there are no known interactions between Lipitor (atorvastatin) and vitamin B12. Lipitor is a prescription medication used to lower cholesterol levels, while vitamin B12 is a nutrient that is important for the proper functioning of the nervous system and the production of red blood cells.

DrugPatentWatch [1] provides information about the patent status of Lipitor and does not mention any interactions with vitamin B12. Drugs.com [2] also states that there are no known interactions between atorvastatin and vitamin B12. ConsumerLab [3] provides a list of drugs that should be avoided when taking statins, but vitamin B12 is not on the list.

It is important to note that while there are no known interactions between Lipitor and vitamin B12, it is always a good idea to talk to your doctor or pharmacist before taking any new medications or supplements. They can provide personalized advice based on your individual health status and medication regimen.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.drugs.com/drug-interactions/atorvastatin-with-vitamin-b12-276-0-754-3756.html
[3] https://www.consumerlab.com/answers/which-drugs-should-be-avoided-when-taking-statins/statin-supplement-interactions/