Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels in the blood. One of the potential side effects of Lipitor is irregular heartbeats, also known as arrhythmias [1].

Sotalol is a medication used to treat arrhythmias [2]. According to the National Health Service (NHS), sotalol can take several weeks to take effect and the dose may need to be adjusted over time to achieve the desired effect [2].

A study published in Circulation Research found that the use of atorvastatin was associated with a decrease in the expression of genes related to ion channels in the heart, which can lead to arrhythmias [3]. The study also found that the effects of atorvastatin on gene expression persisted even after the medication was discontinued [3].

Based on the available information, it is unclear how long it would take to reverse Lipitor-induced irregular heartbeats. It is recommended that individuals who experience any potential side effects of Lipitor, including irregular heartbeats, speak with their healthcare provider to determine the appropriate course of action [1].

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