There is no specific timeframe mentioned in the sources for how long one should wait after taking Lipitor to do yoga. However, it is important to note that Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels in the blood [1]. One of the potential side effects of Lipitor is muscle pain or weakness [2]. Therefore, if you experience any muscle pain or weakness after taking Lipitor, it may be best to wait until the symptoms subside before doing any physical activity such as yoga. Additionally, it is recommended to speak with a healthcare provider before starting any new exercise routine, 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://utswmed.org/medblog/statins-pregnancy-familial-hypocholesteremia/