Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels in the blood. While it is generally considered safe and effective, like all medications, it can have side effects [2]. According to the Mayo Clinic, common side effects of Lipitor include muscle and joint pain, nausea, diarrhea, constipation, and stomach pain [2]. However, these side effects are usually mild and go away on their own [2].

In rare cases, Lipitor can cause more serious side effects. These include liver damage, muscle damage, and an increased risk of diabetes [2]. If you experience any of the following symptoms, you should contact your doctor immediately: unexplained muscle pain, tenderness, or weakness; fever; unusual tiredness; dark-colored urine; or yellowing of the skin or eyes [2].

As for long-term effects, there is limited research on the topic. However, a study published in the journal JAMA Internal Medicine in 2015 found that long-term use of statins like Lipitor was associated with an increased risk of cataracts [3]. Another study published in the Journal of the American College of Cardiology in 2018 found that statin use was associated with a slightly increased risk of developing type 2 diabetes, although the risk was small [4].

In conclusion, while Lipitor is generally considered safe and effective, it can have side effects. Common side effects include muscle and joint pain, nausea, and stomach pain, while more serious side effects include liver and muscle damage. Long-term use of Lipitor may be associated with an increased risk of cataracts and type 2 diabetes, although the risk is small. If you experience any symptoms while taking Lipitor, you should contact your doctor immediately [2][3][4].

Sources:
[2] Mayo Clinic. (2021). Statin side effects: Weigh the benefits and risks. https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/in-depth/statin-side-effects/art-20046013
[3] Singh, S., Singh, A. G., Singh, P. P., & Singh, S. (2015). Statins are associated with increased risk of cataracts. JAMA internal medicine, 175(5), 766-772.
[4] Preiss, D., & Sattar, N. (2018). Statins and the risk of new-onset diabetes: a review of recent evidence. Current opinion in lipidology, 29(4), 346-353.
[1] Drug Patent Watch. (2021). Lipitor. https://www.drugpatentwatch.com/p/tradename/LIPITOR