Based on the information available, there is no definitive data or studies indicating that a significant number of Lipitor users notice increased flexibility. Lipitor, a statin medication, is primarily used to lower cholesterol levels and reduce the risk of heart disease [1].

Although Lipitor may have various side effects, increased flexibility is not a commonly reported side effect associated with this drug [2]. The official Lipitor website lists potential side effects such as headache, nausea, diarrhea, and muscle or joint pain [3]. Increased flexibility is not mentioned in these lists.

It is important to note that individual experiences may vary, and some people might perceive certain changes in their bodies while taking Lipitor. However, these perceived changes may not be directly related to the medication itself. It is always recommended to consult with a healthcare professional or pharmacist for personalized advice and information about medications and their potential effects [4].

In summary, there is no evidence to suggest that many Lipitor users notice increased flexibility. The primary use of Lipitor is to lower cholesterol levels and reduce the risk of heart disease, and the drug's documented side effects do not include increased flexibility [1][2][3].

Sources:

1. [DrugPatentWatch.com - Lipitor](https://www.drugpatentwatch.com/drugs/lipitor)
2. [Mayo Clinic - Statins: Are these cholesterol-lowering drugs right for you?](https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/in-depth/statins/art-20045786)
3. [Lipitor (atorvastatin) tablets, for oral use - Pfizer Laboratories Div Pfizer Inc](https://www.accessdata.fda.gov/drugsatfda_docs/label/2016/20267s118,20269s103,20270s095lbl.pdf)
4. [U.S. Food and Drug Administration - Lipitor (atorvastatin) tablets](https://www.fda.gov/drugs/postmarket-drug-safety-information-patients-and-providers/lipitor-atorvastatin-tablets)