Lipitor is a medication that is commonly used to lower cholesterol levels in the body. It is a brand name for the drug Atorvastatin [1]. While Lipitor is generally considered safe and effective, it can have some side effects. The most common side effects of Lipitor are muscle pain, weakness, and tenderness [2]. In rare cases, Lipitor can cause muscle damage, which can lead to kidney failure [3]. Lipitor can also cause liver damage, although this is also rare. Symptoms of liver damage can include yellowing of the skin or eyes, dark urine, and upper stomach pain [2]. Lipitor can also cause digestive problems, such as nausea, diarrhea, and constipation [2]. Other side effects of Lipitor may include headache, dizziness, and insomnia [3]. In very rare cases, Lipitor can cause a serious allergic reaction, which can lead to difficulty breathing, swelling of the face or throat, and hives [2]. If you experience any of these symptoms while taking Lipitor, you should seek medical attention immediately. It is important to note that not everyone who takes Lipitor will experience side effects, and that the benefits of the medication may outweigh the risks for many people. However, if you are concerned about the potential side effects of Lipitor, you should talk to your doctor about your options [3].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.nhs.uk/medicines/atorvastatin/side-effects-of-atorvastatin/
[3] https://www.drugwatch.com/lipitor/side-effects/