Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels in the blood [1]. As for precautions for Lipitor users doing yoga stretches, there are no specific precautions mentioned in the sources provided. However, it is always recommended to consult with a healthcare provider before starting any new exercise routine, including yoga stretches, especially if you have any pre-existing medical conditions or concerns [2]. Additionally, some common side effects of Lipitor include muscle pain and weakness, which could potentially be aggravated by certain yoga poses [3]. It is important to listen to your body and avoid any poses that cause discomfort or pain. Overall, while there are no specific precautions for Lipitor users doing yoga stretches, it is always best to consult with a healthcare provider and listen to your body to ensure a safe and effective exercise routine.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.everydayhealth.com/drugs/lipitor
[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4679305/