Lipitor is a brand name for the drug atorvastatin, which is a medication used to lower cholesterol levels in the blood [1]. One of the side effects of taking Lipitor is muscle pain and stiffness [2]. A study published in the Journal of Pharmacy Practice suggests that patients who experience muscle pain and stiffness while taking statins, including Lipitor, may experience improvement in their symptoms within two to four weeks of stopping the medication [3].

According to Harvard Health Publishing, some people may experience muscle pain and stiffness while taking statins like Lipitor, but not everyone experiences these side effects [2]. The article suggests that patients who experience muscle pain and stiffness while taking Lipitor should speak with their doctor about adjusting their medication dosage or trying a different medication [2].

In summary, patients who experience muscle pain and stiffness while taking Lipitor may experience improvement in their symptoms within two to four weeks of stopping the medication, according to a study published in the Journal of Pharmacy Practice [3]. However, not everyone experiences these side effects, and patients who do should speak with their doctor about adjusting their medication dosage or trying a different medication, according to Harvard Health Publishing [2].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.health.harvard.edu/pain/managing-statin-muscle-pain
[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3463373/