Lipitor is a medication that is used to lower cholesterol levels in the blood, and it is generally well-tolerated by most people. However, like all medications, it can cause some adverse effects. The most common side effects of Lipitor are muscle pain and weakness, which can be serious in rare cases [1].

Potassium substitutes are used to replace potassium in the body when it is low. They are generally safe, but they can cause some adverse effects. The most common side effects of potassium substitutes are stomach upset, nausea, vomiting, and diarrhea. In rare cases, they can cause more serious side effects, such as irregular heartbeat and muscle weakness [2].

There is no known interaction between Lipitor and potassium substitutes. However, it is important to talk to your doctor before taking any new medication or supplement, especially if you are already taking other medications. Your doctor can help you determine if a potassium substitute is right for you and can monitor you for any potential adverse effects [3].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4357351/
[3] https://www.ahajournals.org/doi/full/10.1161/CIRCRESAHA.118.312782.