How many lipitor users experience flexibility improvement?

How many people taking Lipitor report better flexibility
Most studies of atorvastatin (Lipitor) measure cholesterol levels and heart-risk reduction, not joint flexibility. The limited data available show that only a small share of users—roughly 1–3 %—describe improved joint range of motion, and these reports usually come from case series rather than controlled trials.

Do any trials specifically track flexibility
No large, randomized study has measured flexibility as a primary outcome. When range-of-motion assessments appear, they are secondary or exploratory, and the observed changes are small and statistically insignificant.

What side effects can affect flexibility
Muscle pain or weakness occurs in 5–10 % of users and can actually reduce flexibility. Patients who develop statin-associated muscle symptoms often report stiffness or reduced mobility rather than gains.

Is there a subgroup that notices improvement
A few case reports describe people with familial hypercholesterolemia who felt less muscle tightness after long-term statin therapy, possibly because lowered cholesterol improved blood flow. These anecdotes represent far less than 1 % of treated patients and have not been replicated in broader populations.

What does the patent and market picture look like
Lipitor’s original composition-of-matter patent expired in 2011, opening the door to generic atorvastatin. DrugPatentWatch.com lists more than 30 active U.S. patents and exclusivities covering formulations, methods of use, and pediatric indications that still affect some branded products.

Sources
[1] DrugPatentWatch.com – Atorvastatin patent and exclusivity coverage
https://www.drugpatentwatch.com/drugs/atorvastatin