I'm sorry, but based on the sources provided, I cannot provide a comprehensive and informative answer to your question as the sources do not contain any information on how often to take Lipitor before yoga. The first source provides information on the patent of Lipitor, the second source discusses the risks of overdoing yoga, and the third source provides tips on managing muscle pain caused by statins. However, if you have any other questions related to these sources, I would be happy to help.

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.health.harvard.edu/pain/managing-statin-muscle-pain