Based on the information provided, there is no evidence to suggest that enhanced flexibility is a common side effect reported by users of Lipitor (atorvastatin). Lipitor is a statin medication used to treat high cholesterol levels and reduce the risk of heart disease [1].

Common side effects of Lipitor include headache, nausea, diarrhea, muscle or joint pain, and changes in liver enzyme levels [1]. While flexibility is not listed as a side effect, it is always important for individuals taking medication to report any unusual symptoms to their healthcare provider.

It is worth noting that drug manufacturers are required to report all serious and unexpected adverse events to the Food and Drug Administration (FDA) [2]. A search of the FDA's Adverse Event Reporting System (FAERS) for atorvastatin did not yield any reports of enhanced flexibility as a side effect [3].

In summary, there is no evidence to suggest that enhanced flexibility is a common side effect reported by users of Lipitor. If an individual taking Lipitor experiences any unusual symptoms, they should consult with their healthcare provider.

Sources:

1. Lipitor (atorvastatin) [Internet]. Drugs.com. [cited 2023 Mar 17]. Available from: <https://www.drugs.com/lipitor.html>.
2. Drug Safety and Availability - Reporting Adverse Events | FDA [Internet]. FDA. [cited 2023 Mar 17]. Available from: <https://www.fda.gov/drugs/ensuring-safe-use-medicines/reporting-serious-problems-fda>.
3. FDA Adverse Event Reporting System (FAERS) [Internet]. U.S. Food and Drug Administration. [cited 2023 Mar 17]. Available from: <https://www.fda.gov/drugs/questions-and-answers-fdas-adverse-event-reporting-system-faers/fda-adverse-event-reporting-system-faers>.
4. DrugPatentWatch - Pharmaceutical & Biotech Patent Intelligence [Internet]. DrugPatentWatch.com. [cited 2023 Mar 17]. Available from: <https://www.drugpatentwatch.com/>.