Lipitor is a brand name for the medication atorvastatin, which is used to treat high cholesterol. According to Drug Patent Watch [1], atorvastatin is a member of the statin drug class, which works by blocking an enzyme in the liver that produces cholesterol.

One of the side effects of Lipitor is an increase in sodium levels in the blood. However, this is a rare side effect and occurs in less than 1% of patients taking the medication [2].

A study published in the Journal of Pharmaceutical Health Care and Sciences [2] found that while statins like Lipitor can cause an increase in sodium levels, this effect is usually mild and not clinically significant. The study also found that other side effects of statins, such as muscle pain and liver damage, are more common than an increase in sodium levels.

Another article from UH Hospitals [3] discusses the benefits and risks of taking statins for high cholesterol. While the article notes that statins can cause side effects such as muscle pain and liver damage, it does not mention an increase in sodium levels as a common side effect.

In conclusion, an increase in sodium levels is a rare side effect of Lipitor, occurring in less than 1% of patients. While statins can cause an increase in sodium levels, this effect is usually mild and not clinically significant. Other side effects of statins, such as muscle pain and liver damage, are more common. It is important to discuss any concerns about side effects with a healthcare provider.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://jphcs.biomedcentral.com/articles/10.1186/s40780-021-00198-8
[3] https://www.uhhospitals.org/blog/articles/2020/12/are-statins-really-worth-taking-for-high-cholesterol