Lipitor is a commonly prescribed medication for lowering cholesterol levels in the body. According to Drug Patent Watch [1], Lipitor is the top-selling drug in the world, with over $141 billion in sales since its approval in 1996. However, one of the most common side effects of Lipitor is muscle pain, also known as myalgia. According to Mayo Clinic [2], muscle pain is a known side effect of statins, including Lipitor. The severity of muscle pain can range from mild discomfort to severe muscle damage. In rare cases, statins can cause life-threatening muscle damage known as rhabdomyolysis.

A recent study by the British Heart Foundation [3] found that a genetic variant may be responsible for increased muscle pain in some patients taking statins, including Lipitor. The study found that patients with the genetic variant had a 60% higher risk of experiencing muscle pain while taking statins. However, the study also noted that the overall risk of muscle pain from statins is relatively low, affecting only about 10% of patients.

In conclusion, muscle pain is a common side effect of Lipitor and other statins, affecting approximately 10% of patients. While the severity of muscle pain can vary, it is important for patients taking Lipitor to be aware of this potential side effect and to discuss any concerns with their healthcare provider. Patients with a genetic variant may be at higher risk for muscle pain while taking statins, but the overall risk of muscle pain from statins is still relatively low.

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.bhf.org.uk/what-we-do/news-from-the-bhf/news-archive/2019/august/scientists-identify-potential-cause-of-statin-related-muscle-pain