Lipitor, also known as atorvastatin, is a commonly prescribed medication used to lower cholesterol levels in the blood. According to DrugPatentWatch [1], Lipitor works by inhibiting an enzyme in the liver that is responsible for producing cholesterol. While Lipitor is generally well-tolerated, one of its known side effects is muscle pain or weakness, which can affect all muscle groups in the body.

A study published in the Journal of Clinical Lipidology [2] found that muscle-related side effects from statins, including Lipitor, are more common in patients who are older, female, have a lower body mass index, and have a history of muscle problems. However, the study also noted that muscle-related side effects are typically mild and can often be managed without discontinuing the medication.

If a patient experiences muscle pain or weakness while taking Lipitor, there are several potential fixes that can be discussed with a doctor, according to the Cleveland Clinic [3]. These include switching to a different statin medication, adjusting the dosage of Lipitor, taking a break from the medication, or taking supplements such as CoQ10 or vitamin D.

In conclusion, while Lipitor can affect all muscle groups in the body, muscle-related side effects are generally mild and can often be managed without discontinuing the medication. Patients who experience muscle pain or weakness while taking Lipitor should discuss potential fixes with their doctor.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2949584/
[3] https://health.clevelandclinic.org/statins-giving-you-achy-muscles-ask-your-doctor-about-these-4-potential-fixes/