Lipitor is a medication used to lower cholesterol levels in the body. According to Drug Patent Watch [1], Lipitor's active ingredient is atorvastatin calcium, which belongs to a class of drugs called statins. Statins work by blocking the enzyme that produces cholesterol in the liver, thus reducing the amount of cholesterol in the blood.

However, like any medication, Lipitor has potential side effects. According to the Mayo Clinic [2], common side effects of statins include muscle and joint pain, nausea, diarrhea, and constipation. More serious side effects, such as liver damage, diabetes, and memory loss, are rare but possible.

Medical News Today [3] states that while statins have been shown to be generally safe and effective, there have been reports of rare cases of muscle damage and liver problems associated with the use of Lipitor and other statins. However, the article notes that these side effects are typically reversible once the medication is stopped.

In conclusion, while Lipitor and other statins have potential side effects, permanent damage is rare. The benefits of reducing cholesterol levels and preventing heart disease often outweigh the risks associated with the medication. Patients should always consult with their healthcare provider before starting any new medication and report any concerning side effects.

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.medicalnewstoday.com/articles/drugs-lipitor-side-effects