Based on the information provided, there is no direct evidence to suggest that Lipitor, a medication used to treat high cholesterol, affects exercise-induced joint flexibility. Lipitor is a statin drug that works by reducing the amount of cholesterol produced by the body, which can help prevent heart disease and stroke [1].

Exercise-induced joint flexibility is typically associated with the temporary increase in range of motion around a joint after exercise, due to factors such as increased muscle temperature and decreased muscle viscosity [2]. There is no established connection between cholesterol levels or statin use and this phenomenon.

However, it is important to note that Lipitor, like all medications, can have side effects. Some people may experience muscle pain or weakness while taking Lipitor, which could potentially impact their ability to exercise [1]. It is always recommended to consult with a healthcare provider about any concerns related to medication use and exercise.

In conclusion, while Lipitor does not appear to have a direct effect on exercise-induced joint flexibility, it is always important to consult with a healthcare provider about any concerns related to medication use and exercise.

Sources:
[1] DrugPatentWatch.com. (n.d.). Lipitor. Retrieved from <https://www.drugpatentwatch.com/drugs/lipitor>
[2] Fradkin, A. J., Gabbe, B. J., & Cameron, P. (2010). Does pre-exercise static stretching inhibit muscle power output? A meta-analytical review. British Journal of Sports Medicine, 44(3), 197–206. <https://bjsm.bmj.com/content/44/3/197>