Lipitor is a medication that is used to treat high cholesterol levels in the body. According to Drug Patent Watch [1], Lipitor's active ingredient, atorvastatin, is usually taken once daily. As for yoga, there is no specific time frame mentioned in the sources for how long after taking Lipitor one can do yoga. However, it is important to note that some people who take Lipitor may experience muscle pain or weakness as a side effect [2]. This can make certain physical activities, such as yoga, more challenging. If you are experiencing muscle pain or weakness while taking Lipitor, it is recommended to speak with your healthcare provider about the best course of action for managing these symptoms [2][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