Lipitor is a brand name for the drug atorvastatin, which is a medication used to lower cholesterol levels in the blood [1]. According to the sources provided, there is limited information available regarding the effects of Lipitor on sodium levels in the body.

One study published in the Journal of Pharmaceutical Health Care and Sciences found that atorvastatin did not have a significant effect on sodium levels in the blood of rats [2]. However, this study was conducted on animals and may not necessarily reflect the effects of the drug on humans.

Another study published in the Journal of Clinical Lipidology found that atorvastatin treatment was associated with a small but significant decrease in serum sodium levels in patients with dyslipidemia (abnormal cholesterol levels) [3]. However, the study noted that the clinical significance of this decrease was unclear and that further research was needed to fully understand the relationship between atorvastatin and sodium levels.

Overall, while there is some limited evidence suggesting that atorvastatin may have a small effect on sodium levels, the available studies are not conclusive and further research is needed to fully understand the relationship between the two.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://jphcs.biomedcentral.com/articles/10.1186/s40780-021-00198-8
[3] https://pubmed.ncbi.nlm.nih.gov/22698702/