Lipitor is a widely used medication that belongs to the class of statins, which are used to lower cholesterol levels and reduce the risk of heart disease [1]. While Lipitor has been found to be effective in reducing cholesterol levels, it may cause some side effects, including muscle pain and stiffness [2].

According to a study published in the Journal of Clinical Pharmacology, muscle stiffness and pain are common side effects of statins, including Lipitor [3]. The study found that approximately 10% of patients who took statins experienced muscle pain or stiffness, and that these side effects were more common in patients who took higher doses of the medication.

It is important to note that muscle pain and stiffness caused by Lipitor are usually temporary and resolve after discontinuing the medication [2]. However, in rare cases, statins can cause a serious condition called rhabdomyolysis, which is the breakdown of muscle tissue that can lead to kidney damage [2]. Therefore, it is important to consult a healthcare provider if you experience severe muscle pain or stiffness while taking Lipitor.

In conclusion, Lipitor can cause muscle pain and stiffness as a side effect, but these symptoms are usually temporary and resolve after discontinuing the medication. However, in rare cases, Lipitor can cause a serious condition called rhabdomyolysis, which requires immediate medical attention. Patients should consult a healthcare provider if they experience severe muscle pain or stiffness while taking Lipitor [1][2][3].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.goodrx.com/classes/statins/muscle-pain-statins-how-to-prevent-common-side-effect
[3] https://pubmed.ncbi.nlm.nih.gov/15361892/