There is no specific time frame mentioned in the provided sources for how long one should wait after taking Lipitor before doing yoga. However, it is important to note that muscle pain is a potential side effect of taking statins such as Lipitor [2]. Therefore, if you experience muscle pain or weakness after taking Lipitor, it may be best to wait until these symptoms have subsided before engaging in any physical activity, including yoga. Additionally, it is recommended to speak with a healthcare provider before starting any new exercise regimen, especially if you are taking medication [3].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.health.harvard.edu/pain/managing-statin-muscle-pain
[3] https://www.medicalnewstoday.com/articles/246611