Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels in the blood. According to Drug Patent Watch , the patent for Lipitor expired in 2011, making it available as a generic drug. While Lipitor has been shown to be effective in reducing cholesterol levels, it may cause side effects in some people. The Mayo Clinic  notes that common side effects of statins, including Lipitor, may include muscle pain, liver damage, digestive problems, and memory loss. However, the Mayo Clinic also states that serious side effects are rare and that the benefits of taking statins usually outweigh the risks.
A study published in the Journal of the American College of Cardiology  found that long-term use of statins, including Lipitor, was not associated with an increased risk of developing diabetes or kidney disease. However, the study did find a slightly increased risk of developing cataracts in people who took statins for more than ten years.
In conclusion, while Lipitor may cause side effects in some people, serious side effects are rare and the benefits of taking statins usually outweigh the risks. Long-term use of statins, including Lipitor, has not been shown to cause significant long-term damage, although there may be a slightly increased risk of developing cataracts in people who take statins for more than ten years. As with any medication, it is important to discuss the risks and benefits of Lipitor with your doctor.