Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels in the body. While it is generally considered safe and effective, there are some potential side effects associated with its use. According to the Mayo Clinic [2], common side effects of atorvastatin include headache, nausea, diarrhea, constipation, and muscle and joint pain. These side effects are usually mild and go away on their own. However, in rare cases, atorvastatin can cause more serious side effects, such as liver damage, muscle damage, and an increased risk of developing type 2 diabetes. Patients should consult with their doctor if they experience any of these symptoms.

The NHS [3] also lists some potential side effects of atorvastatin, including insomnia, dizziness, skin rash, and an increased risk of bleeding or bruising. Patients should seek medical attention if they experience any severe side effects, such as severe muscle pain, weakness, or tenderness, or yellowing of the skin or eyes.

It is important to note that not everyone who takes atorvastatin will experience side effects, and the benefits of the medication may outweigh the risks for many patients. However, patients should always consult with their doctor before starting any new medication, and report any side effects they experience while taking atorvastatin.

Sources:
[2] Mayo Clinic. (2021). Statin side effects: Weigh the benefits and risks. Retrieved from https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/in-depth/statin-side-effects/art-20046013
[3] NHS. (2021). Atorvastatin: side effects. Retrieved from https://www.nhs.uk/medicines/atorvastatin/side-effects-of-atorvastatin/
[1] Drug Patent Watch. (2021). Lipitor. Retrieved from https://www.drugpatentwatch.com/p/tradename/LIPITOR