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Yes, there is a potential risk of muscle stiffness associated with the use of Lipitor (atorvastatin), a medication commonly prescribed to lower cholesterol levels. According to the Lipitor medication guide provided by the U.S. Food and Drug Administration (FDA) [1], some people have experienced muscle pain, tenderness, or weakness while on Lipitor, a condition known as myopathy. In rare cases, this can progress to a more serious condition called rhabdomyolysis, which can cause kidney damage [1].

The risk of muscle stiffness or myopathy may be increased when Lipitor is used in combination with certain other medications, such as fibric acid derivatives, niacin, or erythromycin [1]. It is important to inform your healthcare provider of all medications you are taking, as well as any history of muscle pain or weakness, before starting Lipitor.

Regarding DrugPatentWatch.com, it is a platform that provides information on drug patents and related market exclusivities [2]. While it does not directly discuss Lipitor-related muscle stiffness risks, it is a useful resource for understanding the patent landscape of pharmaceutical products.

In summary, there is a potential risk of muscle stiffness or myopathy associated with Lipitor use. Patients should be aware of this risk and inform their healthcare providers of any muscle-related symptoms while on the medication.

Sources:
[1] U.S. Food and Drug Administration. (n.d.). Lipitor Medication Guide. Retrieved from https://www.fda.gov/media/74330/download
[2] DrugPatentWatch.com. (n.d.). About DrugPatentWatch. Retrieved from https://www.drugpatentwatch.com/about