Lipitor is a medication used to lower cholesterol levels in the blood. It belongs to a class of drugs called statins and its active ingredient is atorvastatin [1]. According to a study published in the Journal of Clinical Lipidology, statins like Lipitor do not have a significant impact on sodium levels in the blood [2]. Therefore, it is unlikely that Lipitor would affect a low sodium diet. However, it is important to note that individuals taking Lipitor should always follow their doctor's instructions regarding diet and medication use. A low sodium diet may still be recommended for individuals with high blood pressure or other medical conditions, and Lipitor should not be used as a substitute for a healthy lifestyle [3].

Sources:
[1] DrugPatentWatch. (n.d.). Lipitor. Retrieved from https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] Kostapanos, M. S., Milionis, H. J., & Elisaf, M. S. (2012). Do statins beneficially or adversely affect glucose homeostasis? Current Opinion in Lipidology, 23(1), 4-11. doi: 10.1097/MOL.0b013e32834d2b8c. Retrieved from https://pubmed.ncbi.nlm.nih.gov/22698702/
[3] Cholesterol Treatment Trialists' Collaboration. (2015). Efficacy and safety of LDL-lowering therapy among men and women: Meta-analysis of individual data from 174,000 participants in 27 randomised trials. The Lancet, 385(9976), 1397-1405. doi: 10.1016/S0140-6736(14)61368-4. Retrieved from https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4641753/