Based on the information available, there is no definitive answer to how much Lipitor impacts flexibility in most users. Lipitor, a medication used to treat high cholesterol, is not known to have direct effects on flexibility. It is a statin, a class of drugs that works by blocking a substance your body needs to make cholesterol [1].

Adverse effects of Lipitor, as listed by the FDA, include muscle pain, liver damage, and increased blood sugar levels, but flexibility is not mentioned [2]. The drug's patent expired in 2011, leading to the availability of generic versions [3].

However, it is important to note that individual responses to medication can vary. Some people might experience unexpected side effects that are not commonly associated with a drug. If a user of Lipitor experiences a significant change in flexibility or any other unusual symptoms, they should consult with their healthcare provider.

In conclusion, while Lipitor does not have known direct effects on flexibility, individual responses can vary. Always consult with a healthcare provider for personalized medical advice.

Sources:
[1] Mayo Clinic. (2021). Atorvastatin (Oral Route). Retrieved from https://www.mayoclinic.org/drugs-supplements/atorvastatin-oral-route/side-effects/drg-20064551
[2] U.S. Food and Drug Administration. (2021). Lipitor. Retrieved from https://www.fda.gov/drugs/postmarket-drug-safety-information-patients-and-providers/lipitor-atorvastatin-calcium
[3] DrugPatentWatch. (2021). Lipitor (Atorvastatin Calcium). Retrieved from https://www.drugpatentwatch.com/drugs/lipitor/