Based on the sources provided, there is limited information regarding the potential interactions between Lipitor (atorvastatin) and vitamin C.

The first source, DrugPatentWatch, provides information about Lipitor but does not specifically mention any interactions with vitamin C [1].

The second source, Drugs.com, provides a drug interaction checker that indicates there are no known interactions between atorvastatin (the active ingredient in Lipitor) and vitamin C [2].

The third source, a study published in the National Center for Biotechnology Information, discusses the potential benefits of vitamin C supplementation in patients taking atorvastatin. The study suggests that vitamin C may help reduce the oxidative stress caused by atorvastatin therapy, but it does not mention any specific interactions between the two [3].

Based on the available information, there is no clear evidence of significant interactions between Lipitor and vitamin C. However, it is always advisable to consult with a healthcare professional or pharmacist before starting any new medication or supplement to ensure safety and effectiveness.

Sources:
[1] DrugPatentWatch: https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] Drugs.com: https://www.drugs.com/drug-interactions/atorvastatin-with-vitamin-c-276-0-238-3823.html
[3] National Center for Biotechnology Information: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3885376/