There is no direct information available in the provided sources regarding the specific effect of Lipitor on flexibility. However, we can gather some insights based on the information provided.

Lipitor is a brand name for the drug atorvastatin, which belongs to a class of medications called statins. Statins are primarily used to lower cholesterol levels in the body and reduce the risk of cardiovascular diseases [1].

According to the first source, Drug Patent Watch, it provides information on the patent status of Lipitor but does not mention anything about the drug's effect on flexibility.

The second source, a study published in the National Center for Biotechnology Information (NCBI), discusses the side effects of statins, including muscle-related issues such as myopathy and rhabdomyolysis. However, it does not specifically mention the effect on flexibility.

The third source, GoodRx, provides information on statins and mentions that some individuals may experience joint pain as a side effect of these medications. However, it does not provide any details about the impact on flexibility.

Based on the available information, it is difficult to determine the specific effect of Lipitor on flexibility. It is important to note that individual responses to medications can vary, and it is best to consult with a healthcare professional for personalized advice regarding the potential effects of Lipitor on flexibility.

Sources:
[1] Drug Patent Watch. Lipitor. Retrieved from: https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] National Center for Biotechnology Information. Statin-associated muscle symptoms: impact on statin therapy-European Atherosclerosis Society Consensus Panel Statement on Assessment, Aetiology and Management. Retrieved from: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3463373/
[3] GoodRx. Statins. Retrieved from: https://www.goodrx.com/classes/statins/joint-pain