Lipitor, also known as atorvastatin, is a medication that is used to treat high cholesterol levels in the blood. According to Drug Patent Watch [1], Lipitor is a patented drug that was first approved by the FDA in 1996. The drug works by blocking an enzyme in the liver that is responsible for producing cholesterol. However, like all medications, Lipitor can have side effects.

One of the most commonly reported side effects of Lipitor is muscle weakness, which can be a sign of a condition called rhabdomyolysis. According to the Mayo Clinic [2], rhabdomyolysis is a rare but serious condition that can occur when muscle tissue breaks down and releases its contents into the bloodstream. This can cause kidney damage and other complications.

A study published in the Journal of the American College of Cardiology [3] found that muscle-related side effects are more common in patients taking high doses of Lipitor. The study also found that patients who had a history of muscle-related side effects with other statins were more likely to experience similar side effects with Lipitor.

It is important to note that not everyone who takes Lipitor will experience muscle weakness or other side effects. However, if you are taking Lipitor and experience any symptoms of muscle weakness, such as pain, tenderness, or weakness, you should contact your doctor right away.

In conclusion, Lipitor is a medication used to treat high cholesterol levels in the blood. While it is generally safe and effective, it can have side effects, including muscle weakness. Patients taking high doses of Lipitor or those with a history of muscle-related side effects with other statins may be at a higher risk of experiencing these side effects. If you are taking Lipitor and experience any symptoms of muscle weakness, you should contact your doctor immediately.

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.ncbi.nlm.nih.gov/pmc/articles/PMC2949584/