Lipitor is a brand name for the drug atorvastatin, which is a type of statin medication used to lower cholesterol levels in the blood [1]. Statins like Lipitor are generally considered safe and effective, but they can cause side effects in some people, including irregular heartbeats or arrhythmias [2].

According to the National Health Service (NHS), arrhythmias are a potential side effect of statins, including Lipitor, but they are rare and usually not serious. In most cases, the arrhythmia will resolve on its own without any treatment. However, if the arrhythmia is severe or persistent, it may require medical intervention [2].

A study published in the journal Circulation Research found that statins like Lipitor can cause changes in the electrical properties of heart cells, which can lead to arrhythmias. However, the study also found that these changes were reversible and that the heart cells returned to normal after the statin treatment was stopped [3].

In conclusion, Lipitor-induced irregular heartbeats can be reversed, and the arrhythmia will usually resolve on its own without any treatment. However, if the arrhythmia is severe or persistent, it may require medical intervention. It is important to speak with a healthcare provider if you experience any side effects while taking Lipitor or any other medication [1][2][3].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.nhs.uk/conditions/statins/considerations/
[3] https://www.ahajournals.org/doi/full/10.1161/CIRCRESAHA.118.312782