Lipitor, also known as atorvastatin, is a prescription medication used to lower cholesterol levels in the blood. According to Drug Patent Watch [1], Lipitor is a statin drug that works by inhibiting an enzyme in the liver that is responsible for producing cholesterol. While Lipitor is generally considered safe and effective, it can cause some side effects, including liver problems.

According to Medical News Today [2], liver problems are a rare but potentially serious side effect of Lipitor. In rare cases, Lipitor can cause liver damage or inflammation, which can lead to jaundice, abdominal pain, and other symptoms. Patients who experience these symptoms should contact their doctor immediately.

The Mayo Clinic [3] notes that while liver problems are a potential side effect of Lipitor, they are rare and usually mild. Most people who take Lipitor do not experience any liver problems, and routine liver function tests are not usually necessary. However, people who have a history of liver disease or heavy alcohol use may be at higher risk for liver problems from Lipitor and should be closely monitored by their doctor.

In conclusion, while liver problems are a potential side effect of Lipitor, they are rare and usually mild. Most people who take Lipitor do not experience any liver problems, and routine liver function tests are not usually necessary. However, people who have a history of liver disease or heavy alcohol use may be at higher risk for liver problems from Lipitor and should be closely monitored by their doctor.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.medicalnewstoday.com/articles/drugs-lipitor-side-effects
[3] https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/in-depth/statin-side-effects/art-20046013