Based on the provided sources, there is no direct evidence to suggest that Lipitor (atorvastatin) decreases endurance performance.

Lipitor is a medication commonly prescribed to lower cholesterol levels and reduce the risk of cardiovascular events. The drug works by inhibiting an enzyme involved in cholesterol synthesis, leading to decreased cholesterol production in the liver [1].

The first source, Drug Patent Watch, provides information on the drug itself, but does not specifically address its impact on endurance performance. Therefore, it does not provide any direct evidence regarding the effect of Lipitor on endurance performance [1].

The second source, a study published on PubMed, investigates the effects of atorvastatin on skeletal muscle performance in rats. The study found that atorvastatin treatment did not significantly affect endurance performance in the rats [2]. However, it is important to note that this study was conducted on animals and not humans, so the results may not directly translate to human performance.

The third source, a research article published on the National Center for Biotechnology Information (NCBI) website, explores the effects of statins, including atorvastatin, on exercise performance in humans. The article suggests that while statins may have some negative effects on skeletal muscle function, the impact on endurance performance is not clear-cut. The study concludes that the overall effect of statins on exercise performance is likely to be modest and may vary among individuals [3].

In summary, based on the provided sources, there is no conclusive evidence to suggest that Lipitor specifically decreases endurance performance. However, it is important to consult with a healthcare professional for personalized advice regarding the use of Lipitor and its potential effects on endurance performance.

Sources:
[1] Drug Patent Watch. Lipitor. Retrieved from https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] PubMed. Effects of atorvastatin on skeletal muscle function and exercise performance in rats. Retrieved from https://pubmed.ncbi.nlm.nih.gov/28807461/
[3] NCBI. Statin therapy and exercise: friend or foe? Retrieved from https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4679305/