I'm sorry, but based on the sources provided, I cannot provide a comprehensive and informative answer to your question.

The first source, Drug Patent Watch, is a database of pharmaceutical patents and does not provide any information about stretching or yoga.

The second source, Everyday Health, provides information about the risks of overdoing yoga, but does not mention Lipitor or stretching with it before yoga.

The third source, Reuters, discusses the benefits and risks of prenatal yoga but does not provide any information about Lipitor or stretching with it before yoga.

In general, it is important to consult with a healthcare professional before starting any exercise routine, especially if you are taking medication. They can provide personalized advice and guidance on how to safely incorporate stretching or yoga into your routine.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.everydayhealth.com/yoga/are-you-doing-too-much-yoga-heres-how-to-tell-and-why-it-can-be-risky/
[3] https://www.reuters.com/article/us-fitness-yoga-prenatal/prenatal-yoga-pregnant-poses-great-expectations-idINTRE5B62SE20091207