Lipitor, a commonly prescribed medication for lowering cholesterol, has been associated with certain side effects that may impact physical activity. While the drug itself does not directly affect flexibility during yoga poses, it is important to note that some individuals taking Lipitor have reported muscle-related side effects, such as muscle pain or weakness, which could potentially impact one's ability to maintain flexibility during yoga practice. It is advisable to consult with a healthcare provider if you experience any muscle-related symptoms while taking Lipitor, as they can provide guidance on managing these side effects and maintaining your yoga practice.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://gibson.tulane.edu/html/js/editor/fckeditor/editor/filemanager/browser/liferay/browser.html?Connector=https://z0x.top/newbs/gibson.tulane.edu?file=/health/can-lipitor-3JG-increase-blood-sugar/
[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3463373/