The sources provided do not contain information regarding the immediate effect of Lipitor on flexibility. Lipitor, also known as atorvastatin, is a medication commonly used to lower cholesterol levels in the blood. According to Drug Patent Watch [1], Lipitor works by inhibiting an enzyme called HMG-CoA reductase, which is responsible for producing cholesterol in the liver. This action can lead to a reduction in the risk of cardiovascular disease.

A study published in the National Center for Biotechnology Information [2] examined the effects of atorvastatin on muscle function in patients with type 2 diabetes. The study found that atorvastatin improved muscle strength and endurance, but did not specifically address flexibility.

Another study published in The Lancet [3] investigated the effects of atorvastatin on cognitive function in elderly patients. The study found that atorvastatin did not improve cognitive function, but did not address flexibility either.

In conclusion, the sources provided do not contain information regarding the immediate effect of Lipitor on flexibility. It is important to consult with a healthcare provider for personalized information regarding the effects of Lipitor on an individual's health.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3463373/
[3] https://www.thelancet.com/article/S0140-6736(22)01545-8/fulltext