There is no evidence to suggest that Lipitor, a medication used to lower cholesterol levels, hinders yoga endurance. Lipitor's active ingredient, atorvastatin, works by blocking an enzyme that the liver uses to produce cholesterol [1]. While some studies have suggested that statins, like Lipitor, may have negative effects on exercise performance, particularly in high-intensity activities, there is no evidence to suggest that this is true for yoga [2]. In fact, a study published in the American Heart Association's journal Circulation found that statin use was associated with improved physical fitness and increased exercise capacity in patients with cardiovascular disease [3]. Therefore, it is unlikely that Lipitor would hinder yoga endurance and may even have a positive impact on overall physical fitness.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3463373/
[3] https://www.ahajournals.org/doi/10.1161/CIR.0000000000000678