Lipitor is a brand name for the drug atorvastatin, which is used to lower cholesterol levels in the blood. While it is generally well-tolerated by most patients, there are some potential side effects that have been reported [2]. Some of the most common side effects of atorvastatin include headache, muscle pain, diarrhea, and nausea [2][3]. However, there are other less common side effects that have been reported, including liver problems, muscle damage, and an increased risk of developing diabetes [2][3]. In rare cases, atorvastatin can also cause a severe allergic reaction [2].

It is important to note that not everyone who takes atorvastatin will experience side effects, and the severity of side effects can vary from person to person. Patients who experience any unusual symptoms while taking atorvastatin should contact their healthcare provider right away [2][3]. Additionally, patients should always inform their healthcare provider of any other medications they are taking, as some drugs can interact with atorvastatin and increase the risk of side effects [2].

Sources:
[2] Mayo Clinic. (2021). Atorvastatin (Oral Route) Side Effects. Retrieved from https://www.mayoclinic.org/drugs-supplements/atorvastatin-oral-route/side-effects/drg-20067003
[3] GoodRx. (2021). Statin Side Effects. Retrieved from https://www.goodrx.com/classes/statins/statin-side-effects