After analyzing the sources provided, there is no direct evidence that suggests Lipitor impacts sodium levels. Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels in the blood [1]. According to the first source, Lipitor's mechanism of action is to inhibit the enzyme HMG-CoA reductase, which is responsible for producing cholesterol in the liver [1]. By reducing the amount of cholesterol produced in the liver, Lipitor can help reduce the risk of heart disease and stroke.

The second source is a study that investigated the effect of atorvastatin on sodium and potassium excretion in urine [2]. The study concluded that atorvastatin did not significantly affect the excretion of sodium or potassium in urine [2]. However, the study did suggest that atorvastatin may have a beneficial effect on blood pressure by reducing sodium reabsorption in the kidneys [2].

The third source is a review article that discusses the potential side effects of statins, including Lipitor [3]. The article mentions that some studies have suggested that statins may increase the risk of developing hyponatremia, a condition characterized by low levels of sodium in the blood [3]. However, the article also notes that the evidence is inconclusive, and more research is needed to determine the relationship between statins and hyponatremia [3].

In summary, there is no direct evidence to suggest that Lipitor impacts sodium levels. While some studies have suggested that atorvastatin may have a beneficial effect on blood pressure by reducing sodium reabsorption in the kidneys, the evidence is inconclusive regarding the relationship between statins and hyponatremia. As with any medication, it is essential to consult with a healthcare provider regarding any potential side effects or interactions with other medications.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://pubmed.ncbi.nlm.nih.gov/18065809/
[3] https://academic.oup.com/ndt/article/23/5/1556/1805591