Based on the information available, there is some evidence to suggest that Lipitor (atorvastatin), a medication commonly used to treat high cholesterol, may contribute to muscle soreness in certain individuals. However, it's important to note that this side effect is not extremely common and many people take Lipitor without experiencing muscle-related issues.

The U.S. National Library of Medicine's MedlinePlus resource lists muscle pain or weakness as a potential side effect of Lipitor, but it's not listed as a common side effect [1]. The likelihood of experiencing muscle soreness or weakness may increase when Lipitor is taken in conjunction with certain other medications, such as fibrates or niacin, or in individuals with certain health conditions [1].

DrugPatentWatch.com also provides information on Lipitor, noting that it is a statin, a class of drugs known to have potential muscle-related side effects [2]. However, the site does not provide specific information on the incidence of muscle soreness associated with Lipitor.

If you're experiencing muscle soreness or weakness and you're taking Lipitor, it's important to discuss this with your healthcare provider. They can help determine whether the muscle soreness is a side effect of the medication or due to another cause.

In summary, while Lipitor may contribute to muscle soreness in some individuals, this side effect is not extremely common. If you're experiencing muscle-related symptoms while taking Lipitor, it's important to discuss this with your healthcare provider.

Sources:
[1] Muscle pain - MedlinePlus, U.S. National Library of Medicine: <https://medlineplus.gov/druginfo/meds/a601265.html>
[2] Lipitor (Atorvastatin Calcium) - DrugPatentWatch.com: <https://www.drugpatentwatch.com/drugs/lipitor>