Based on the information provided, I found one source that discusses potential side effects of Lipitor, but it does not list low sodium levels as a common side effect.
Lipitor, a medication used to treat high cholesterol, can have various side effects, but low sodium levels are not commonly associated with this drug. According to DrugPatentWatch.com, some of the more common side effects of Lipitor include diarrhea, upset stomach, muscle and joint pain, and changes in some laboratory tests [1]. However, it is essential to consult a healthcare professional or pharmacist for comprehensive and accurate information regarding Lipitor's side effects.
Sources:
[1] DrugPatentWatch.com. (n.d.). Lipitor Side Effects. Retrieved from https://www.drugpatentwatch.com/drugs/lipitor