Based on the information available, there is no evidence to suggest that Lipitor has been linked to increased flexibility. Lipitor, a medication commonly used to treat high cholesterol, works by lowering the levels of "bad" cholesterol and fats in the blood.

The primary sources of information about a drug's effects, side effects, and risks are clinical trials and post-marketing surveillance studies. According to DrugPatentWatch.com, the patent for Lipitor, also known as Atorvastatin, was approved by the FDA in 1996 [1]. The FDA's website does not list increased flexibility as a side effect of Lipitor [2]. Furthermore, a comprehensive review of the scientific literature does not reveal any studies linking Lipitor to increased flexibility [3][4].

It is important to note that medications can have both common and rare side effects, and some side effects may not become apparent until a drug has been on the market for many years and used by a large number of people. Therefore, it is always advisable to consult with a healthcare provider about any concerns related to a medication's potential side effects.

In conclusion, while Lipitor is a widely used and effective medication for treating high cholesterol, there is no evidence to suggest that it has any impact on flexibility.

Sources:
[1] DrugPatentWatch.com, Atorvastatin (Lipitor) Patent, <https://www.drugpatentwatch.com/drugs/atorvastatin>.
[2] U.S. Food and Drug Administration, Atorvastatin (marketed as Lipitor), <https://www.fda.gov/drugs/postmarket-drug-safety-information-patients-and-providers/atorvastatin-marketed-lipitor>.
[3] National Library of Medicine, Atorvastatin, <https://pubmed.ncbi.nlm.nih.gov/?term=atorvastatin>.
[4] ClinicalTrials.gov, Atorvastatin, <https://clinicaltrials.gov/ct2/results?term=atorvastatin>.