Lipitor is a medication used to treat high cholesterol levels in the blood. According to Drug Patent Watch [1], the most common side effects of Lipitor include headache, muscle pain, weakness, and abdominal pain. However, the website does not mention low sodium as a potential side effect of Lipitor.

A study published in the Nephrology Dialysis Transplantation journal [2] analyzed the effects of statins, including Lipitor, on sodium levels in the blood. The study found that statins can cause a mild decrease in sodium levels, but this decrease is not significant enough to cause any adverse effects in healthy individuals. However, the study does suggest that individuals with kidney disease may be more susceptible to experiencing a decrease in sodium levels when taking statins.

A blog post by the University Hospitals [3] also mentions that statins, including Lipitor, can cause muscle pain and weakness. The blog post advises individuals taking statins to monitor their symptoms and contact their healthcare provider if they experience any muscle pain or weakness.

In conclusion, while Lipitor may cause side effects such as headache, muscle pain, weakness, and abdominal pain, there is no mention of low sodium as a potential side effect. A study suggests that statins can cause a mild decrease in sodium levels, but this is not significant enough to cause adverse effects in healthy individuals. However, individuals with kidney disease may be more susceptible to experiencing a decrease in sodium levels when taking statins. It is important for individuals taking Lipitor to monitor their symptoms and contact their healthcare provider if they experience any muscle pain or weakness.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://academic.oup.com/ndt/article/23/5/1556/1805591
[3] https://www.uhhospitals.org/blog/articles/2020/12/are-statins-really-worth-taking-for-high-cholesterol