Lipitor, also known as Atorvastatin, is a prescription medication used to lower cholesterol levels and prevent heart disease. According to the Mayo Clinic [2], statins such as Lipitor can cause mild to severe side effects. Some of the common side effects of Lipitor include muscle pain, weakness, and tenderness. In rare cases, statins can cause muscle damage, which can lead to kidney failure. Additionally, Lipitor can cause liver damage, which can lead to liver failure. Patients taking Lipitor should contact their doctor immediately if they experience any signs of liver damage, such as yellowing of the skin or eyes.

Other possible side effects of Lipitor include nausea, diarrhea, constipation, and headache. In rare cases, Lipitor can cause allergic reactions, which can be life-threatening. Symptoms of an allergic reaction include hives, difficulty breathing, and swelling of the face, lips, tongue, or throat. Patients should seek emergency medical attention if they experience any of these symptoms.

It is important to note that not everyone who takes Lipitor will experience side effects. Most people tolerate the medication well. However, patients should always consult with their doctor before taking any medication, especially if they have a history of liver or kidney disease.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/in-depth/statin-side-effects/art-20046013
[3] https://www.nhs.uk/medicines/atorvastatin/side-effects-of-atorvastatin/