Based on the available information, there is no direct link established between Lipitor and flexibility in users.

Lipitor, also known as atorvastatin, is a statin medication used to lower cholesterol levels [1]. The drug's mechanism of action involves inhibiting HMG-CoA reductase, an enzyme that plays a crucial role in cholesterol production [1].

The other two sources discuss the effects of Lipitor on various health aspects, such as cardiovascular diseases and muscle pain, but neither mentions any connection between Lipitor and flexibility [2][3].

In conclusion, while Lipitor is a widely-used medication for managing cholesterol levels, there is no evidence or indication in the provided sources that it has any impact on users' flexibility.

Sources:
[1] <https://www.drugpatentwatch.com/p/tradename/LIPITOR>
[2] <https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3463373/>
[3] <https://digitalcommons.wku.edu/ijesab/vol12/iss1/33/>