According to the sources provided, Lipitor (atorvastatin) is a medication used to lower cholesterol levels in the blood [1][2]. While low potassium levels are not listed as a common side effect of Lipitor, it is important to note that the drug can interact with other medications that may cause a decrease in potassium levels [2][3]. These medications include diuretics, some antibiotics, and some medications used to treat irregular heartbeats [3]. Therefore, it is important for individuals taking Lipitor to inform their healthcare provider of all medications they are taking to ensure that there are no potential interactions that could cause low potassium levels. It is also important to note that individuals with certain medical conditions, such as kidney disease, may be more susceptible to low potassium levels and should be closely monitored while taking Lipitor [3]. As always, individuals should speak with their healthcare provider if they have any concerns or questions about their medications or potential side effects.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.everydayhealth.com/drugs/lipitor
[3] https://www.goodrx.com/drugs/side-effects/these-drugs-can-mess-with-your-potassium